{ "version": "https://jsonfeed.org/version/1.1", "title": "Parallelogramist — Learn", "home_page_url": "https://parallelogramist.com/", "feed_url": "https://parallelogramist.com/learn/feed.json", "description": "Financial literacy you can play with — clear lessons, each paired with an interactive simulator. New lessons as they publish.", "items": [ { "id": "https://parallelogramist.com/learn/compound-interest/", "url": "https://parallelogramist.com/learn/compound-interest/", "title": "Compound Interest & the Time Value of Money", "content_text": "Why money grows on itself, and why starting early beats saving more. Drag the sliders and watch interest take over.", "summary": "Why money grows on itself, and why starting early beats saving more. Drag the sliders and watch interest take over.", "tags": [ "compounding", "saving", "investing", "time-value-of-money" ] }, { "id": "https://parallelogramist.com/learn/rule-of-72/", "url": "https://parallelogramist.com/learn/rule-of-72/", "title": "The Rule of 72: How Fast Does Money Double?", "content_text": "The single most useful number in finance fits on a napkin: divide 72 by your return rate and you get the years it takes your money to double. 8% doubles in ~9 years, 6% in ~12, 12% in ~6. This lesson shows where the rule comes from, why the magic number is 72, and how counting doublings turns a vague 'good return' into a concrete picture of where your money lands.", "summary": "The single most useful number in finance fits on a napkin: divide 72 by your return rate and you get the years it takes your money to double. 8% doubles in ~9 years, 6% in ~12, 12% in ~6. This lesson shows where the rule comes from, why the magic number is 72, and how counting doublings turns a vague 'good return' into a concrete picture of where your money lands.", "tags": [ "compounding", "investing", "returns", "growth", "rule-of-72" ] }, { "id": "https://parallelogramist.com/learn/present-value/", "url": "https://parallelogramist.com/learn/present-value/", "title": "Present Value: Should You Take the Lump Sum or the Payments?", "content_text": "Win the lottery, get a pension buyout, or sell something for 'cash now or installments' and you face the same question: is a pile of money today worth more than a bigger pile spread over years? The answer is present value — the inverse of compounding. A future dollar is worth less than one in hand, and exactly how much less is the whole decision. Drag the discount rate and watch a $800k headline shrink to what it's really worth today.", "summary": "Win the lottery, get a pension buyout, or sell something for 'cash now or installments' and you face the same question: is a pile of money today worth more than a bigger pile spread over years? The answer is present value — the inverse of compounding. A future dollar is worth less than one in hand, and exactly how much less is the whole decision. Drag the discount rate and watch a $800k headline shrink to what it's really worth today.", "tags": [ "time-value-of-money", "present-value", "compounding", "investing", "annuity", "decisions" ] }, { "id": "https://parallelogramist.com/learn/cost-of-waiting/", "url": "https://parallelogramist.com/learn/cost-of-waiting/", "title": "The Cost of Waiting: Why a Late Start Costs More Than the Years You Skip", "content_text": "Two people save the same amount and retire the same year — one just starts ten years later. The gap between them isn't ten years of contributions. It's ten times that, because the years you skip are the ones that would have compounded the longest.", "summary": "Two people save the same amount and retire the same year — one just starts ten years later. The gap between them isn't ten years of contributions. It's ten times that, because the years you skip are the ones that would have compounded the longest.", "tags": [ "compounding", "investing", "retirement", "time-value-of-money", "saving" ] }, { "id": "https://parallelogramist.com/learn/inflation/", "url": "https://parallelogramist.com/learn/inflation/", "title": "What Is Money & Inflation", "content_text": "Money is a promise that holds its value — until inflation quietly chips it away. See the difference between what your money says and what it can buy.", "summary": "Money is a promise that holds its value — until inflation quietly chips it away. See the difference between what your money says and what it can buy.", "tags": [ "inflation", "purchasing-power", "real-vs-nominal", "money", "time-value-of-money" ] }, { "id": "https://parallelogramist.com/learn/income/", "url": "https://parallelogramist.com/learn/income/", "title": "Income & Take-Home Pay", "content_text": "Your salary is not what lands in your account. See where the money goes — and why your tax bracket isn't the rate you actually pay.", "summary": "Your salary is not what lands in your account. See where the money goes — and why your tax bracket isn't the rate you actually pay.", "tags": [ "income", "taxes", "take-home-pay", "marginal-rate", "effective-rate", "fica", "paycheck" ] }, { "id": "https://parallelogramist.com/learn/paycheck-withholding/", "url": "https://parallelogramist.com/learn/paycheck-withholding/", "title": "Paycheck Withholding & the Tax-Refund Myth", "content_text": "A big tax refund feels like a windfall — but it's the opposite. It's a year-long, interest-free loan you made to the IRS, paid back with money that was yours the whole time. Your W-4 decides how much tax comes out of every paycheck; withhold too much and you get a refund, too little and you owe in April. Drag the extra-withholding lever and watch the refund grow as the cash you could have had each payday. The goal isn't a big refund — it's no refund at all.", "summary": "A big tax refund feels like a windfall — but it's the opposite. It's a year-long, interest-free loan you made to the IRS, paid back with money that was yours the whole time. Your W-4 decides how much tax comes out of every paycheck; withhold too much and you get a refund, too little and you owe in April. Drag the extra-withholding lever and watch the refund grow as the cash you could have had each payday. The goal isn't a big refund — it's no refund at all.", "tags": [ "taxes", "income", "take-home-pay", "paycheck", "cash-flow" ] }, { "id": "https://parallelogramist.com/learn/which-dollar-is-worth-most/", "url": "https://parallelogramist.com/learn/which-dollar-is-worth-most/", "title": "Which Dollar Is Worth Most: A Raise, a Side Hustle, or Cutting Costs?", "content_text": "Everyone says 'make more money' — but a dollar you earn and a dollar you don't spend are not worth the same, because the tax code treats them completely differently. A raise is taxed. A side hustle is taxed even harder. A spending cut is tax-free, recurring, and quietly shrinks the nest egg you need to retire. Race all three and see why a dollar saved beats a dollar earned.", "summary": "Everyone says 'make more money' — but a dollar you earn and a dollar you don't spend are not worth the same, because the tax code treats them completely differently. A raise is taxed. A side hustle is taxed even harder. A spending cut is tax-free, recurring, and quietly shrinks the nest egg you need to retire. Race all three and see why a dollar saved beats a dollar earned.", "tags": [ "income", "taxes", "saving", "fica", "opportunity-cost" ] }, { "id": "https://parallelogramist.com/learn/self-employment-tax/", "url": "https://parallelogramist.com/learn/self-employment-tax/", "title": "Gig Work & 1099s: The Self-Employment Tax Surprise", "content_text": "Freelance or contract income at the same headline rate as a job feels like more money — no employer skimming a cut. It isn't, because there's no employer. A W-2 job's employer quietly pays half of your Social Security and Medicare tax; a 1099 worker has no employer, so the full 15.3% comes out of the same gross pay instead. This lesson prices the gap, names the missing employer match, and prices the quarterly payments the IRS expects directly from you.", "summary": "Freelance or contract income at the same headline rate as a job feels like more money — no employer skimming a cut. It isn't, because there's no employer. A W-2 job's employer quietly pays half of your Social Security and Medicare tax; a 1099 worker has no employer, so the full 15.3% comes out of the same gross pay instead. This lesson prices the gap, names the missing employer match, and prices the quarterly payments the IRS expects directly from you.", "tags": [ "taxes", "self-employment", "gig-work", "1099", "freelance", "fica" ] }, { "id": "https://parallelogramist.com/learn/second-income/", "url": "https://parallelogramist.com/learn/second-income/", "title": "Is a Second Income Worth It? The Childcare-and-Commute Math", "content_text": "A second paycheck looks like pure upside — the gross number on the offer letter, added straight onto what the household already earns. It isn't. It's taxed starting at whatever bracket the first earner's income already reached, and it comes with real costs — childcare, a second commute, work clothes, more takeout — that are easy to under-count against the salary. This lesson prices what a second income actually adds, after both.", "summary": "A second paycheck looks like pure upside — the gross number on the offer letter, added straight onto what the household already earns. It isn't. It's taxed starting at whatever bracket the first earner's income already reached, and it comes with real costs — childcare, a second commute, work clothes, more takeout — that are easy to under-count against the salary. This lesson prices what a second income actually adds, after both.", "tags": [ "taxes", "income", "household-budget", "childcare", "career" ] }, { "id": "https://parallelogramist.com/learn/salary-negotiation/", "url": "https://parallelogramist.com/learn/salary-negotiation/", "title": "The Cost of Never Negotiating: A Small Raise, Compounded Over a Career", "content_text": "A candidate who negotiates a starting offer up a few percent looks only a little richer than one who didn't — for exactly one year. Because every raise after that is a percentage of an already-bigger base, the SAME percentage gap grows every year on its own, and the total left on the table over a career is dramatically larger than the one-time ask ever suggested.", "summary": "A candidate who negotiates a starting offer up a few percent looks only a little richer than one who didn't — for exactly one year. Because every raise after that is a percentage of an already-bigger base, the SAME percentage gap grows every year on its own, and the total left on the table over a career is dramatically larger than the one-time ask ever suggested.", "tags": [ "income", "career", "compounding", "negotiation" ] }, { "id": "https://parallelogramist.com/learn/budgeting/", "url": "https://parallelogramist.com/learn/budgeting/", "title": "Budgeting & Cash Flow", "content_text": "A budget is just a plan for every dollar before it arrives. Drag the sliders to split your take-home pay and see what's left to invest.", "summary": "A budget is just a plan for every dollar before it arrives. Drag the sliders to split your take-home pay and see what's left to invest.", "tags": [ "budgeting", "cash-flow", "50-30-20", "needs-vs-wants", "saving" ] }, { "id": "https://parallelogramist.com/learn/emergency-fund/", "url": "https://parallelogramist.com/learn/emergency-fund/", "title": "The Emergency Fund", "content_text": "Your first savings goal isn't a number — it's a length of time. Drag the sliders to size your runway and see how long it takes to build.", "summary": "Your first savings goal isn't a number — it's a length of time. Drag the sliders to size your runway and see how long it takes to build.", "tags": [ "emergency-fund", "saving", "cash-flow", "risk", "budgeting" ] }, { "id": "https://parallelogramist.com/learn/opportunity-cost/", "url": "https://parallelogramist.com/learn/opportunity-cost/", "title": "Opportunity Cost & Trade-Offs", "content_text": "Every dollar you spend is a dollar that can't compound. See what a recurring habit really costs — not to feel guilty, but to choose on purpose.", "summary": "Every dollar you spend is a dollar that can't compound. See what a recurring habit really costs — not to feel guilty, but to choose on purpose.", "tags": [ "opportunity-cost", "trade-offs", "spending", "compounding", "investing" ] }, { "id": "https://parallelogramist.com/learn/latte-factor/", "url": "https://parallelogramist.com/learn/latte-factor/", "title": "The Latte Factor: What a Small Daily Habit Really Costs", "content_text": "Your $5 coffee five mornings a week isn't a $5 decision — it's a five-figure one. See the nest egg a small habit quietly costs, and how much you'd recover by just cutting back instead of quitting.", "summary": "Your $5 coffee five mornings a week isn't a $5 decision — it's a five-figure one. See the nest egg a small habit quietly costs, and how much you'd recover by just cutting back instead of quitting.", "tags": [ "opportunity-cost", "spending", "compounding", "behavior", "saving" ] }, { "id": "https://parallelogramist.com/learn/net-worth/", "url": "https://parallelogramist.com/learn/net-worth/", "title": "Net Worth & the Order of Operations: Where Every Dollar Goes First", "content_text": "Overwhelmed about where to start with money? There's one number that tracks your progress — net worth — and one priority order that tells every spare dollar exactly where to go. Drag the simulator and watch net worth climb out of the red and compound.", "summary": "Overwhelmed about where to start with money? There's one number that tracks your progress — net worth — and one priority order that tells every spare dollar exactly where to go. Drag the simulator and watch net worth climb out of the red and compound.", "tags": [ "net-worth", "budgeting", "emergency-fund", "debt-payoff", "investing" ] }, { "id": "https://parallelogramist.com/learn/loan-amortization/", "url": "https://parallelogramist.com/learn/loan-amortization/", "title": "Loans & Amortization", "content_text": "Why your early loan payments barely dent the balance — and how a small extra payment quietly deletes years of interest.", "summary": "Why your early loan payments barely dent the balance — and how a small extra payment quietly deletes years of interest.", "tags": [ "loans", "debt", "amortization", "interest", "compounding" ] }, { "id": "https://parallelogramist.com/learn/credit-cards/", "url": "https://parallelogramist.com/learn/credit-cards/", "title": "Credit Cards & the Minimum-Payment Trap", "content_text": "The minimum payment isn't designed to pay your card off — see how it stretches a $5,000 balance into decades, and the one-move fix.", "summary": "The minimum payment isn't designed to pay your card off — see how it stretches a $5,000 balance into decades, and the one-move fix.", "tags": [ "credit-cards", "debt", "interest", "amortization", "minimum-payment" ] }, { "id": "https://parallelogramist.com/learn/apr-apy/", "url": "https://parallelogramist.com/learn/apr-apy/", "title": "Interest, APR & APY", "content_text": "The same interest rate has two names — the quoted one and the real one. Learn to tell them apart, and no loan or savings offer can mislead you again.", "summary": "The same interest rate has two names — the quoted one and the real one. Learn to tell them apart, and no loan or savings offer can mislead you again.", "tags": [ "interest", "apr", "apy", "compounding", "credit-cards" ] }, { "id": "https://parallelogramist.com/learn/debt-payoff/", "url": "https://parallelogramist.com/learn/debt-payoff/", "title": "Debt Payoff Strategies: Avalanche vs Snowball", "content_text": "Same debts, same budget, two orderings — one saves thousands, the other keeps you going. Race avalanche against snowball and see exactly what each costs.", "summary": "Same debts, same budget, two orderings — one saves thousands, the other keeps you going. Race avalanche against snowball and see exactly what each costs.", "tags": [ "debt", "credit-cards", "interest", "amortization", "payoff-strategies" ] }, { "id": "https://parallelogramist.com/learn/credit-scores/", "url": "https://parallelogramist.com/learn/credit-scores/", "title": "Credit Scores: What Actually Moves the Number", "content_text": "One number decides whether you're approved and what rate you pay. Drag the five factors that build it and watch which ones actually move it — and which barely register.", "summary": "One number decides whether you're approved and what rate you pay. Drag the five factors that build it and watch which ones actually move it — and which barely register.", "tags": [ "credit", "credit-score", "debt", "borrowing", "interest" ] }, { "id": "https://parallelogramist.com/learn/good-vs-bad-debt/", "url": "https://parallelogramist.com/learn/good-vs-bad-debt/", "title": "Good Debt vs Bad Debt: It's Not the Loan, It's What You Bought", "content_text": "Is borrowing money smart or dumb? Neither, by itself. The same loan can build wealth or destroy it — the difference is whether what you bought GROWS in value or SHRINKS. Watch one borrower climb into the black while an identical loan drags another underwater on a car.", "summary": "Is borrowing money smart or dumb? Neither, by itself. The same loan can build wealth or destroy it — the difference is whether what you bought GROWS in value or SHRINKS. Watch one borrower climb into the black while an identical loan drags another underwater on a car.", "tags": [ "debt", "loans", "interest", "net-worth", "behavior" ] }, { "id": "https://parallelogramist.com/learn/emergency-fund-vs-debt/", "url": "https://parallelogramist.com/learn/emergency-fund-vs-debt/", "title": "Emergency Fund or Pay Off Debt First?", "content_text": "You've got a credit card balance and no real cushion. Every spare dollar could attack the debt, or build a safety net. The guaranteed-return math almost always says debt — but the math doesn't know what happens if the car breaks down next month.", "summary": "You've got a credit card balance and no real cushion. Every spare dollar could attack the debt, or build a safety net. The guaranteed-return math almost always says debt — but the math doesn't know what happens if the car breaks down next month.", "tags": [ "debt", "emergency-fund", "saving", "risk", "budgeting" ] }, { "id": "https://parallelogramist.com/learn/buy-now-pay-later/", "url": "https://parallelogramist.com/learn/buy-now-pay-later/", "title": "Buy Now, Pay Later — or Save Up First? The True Cost of Financing a Purchase", "content_text": "A small monthly payment makes any purchase feel affordable today. But financing means you PAY interest, while saving up first means you EARN it — the same monthly dollar pointed in opposite directions. Race the two on the same budget and see exactly what 'buy now' costs you, and the one case where financing is actually the smart move.", "summary": "A small monthly payment makes any purchase feel affordable today. But financing means you PAY interest, while saving up first means you EARN it — the same monthly dollar pointed in opposite directions. Race the two on the same budget and see exactly what 'buy now' costs you, and the one case where financing is actually the smart move.", "tags": [ "debt", "credit", "saving", "opportunity-cost", "interest" ] }, { "id": "https://parallelogramist.com/learn/debt-consolidation/", "url": "https://parallelogramist.com/learn/debt-consolidation/", "title": "Debt Consolidation: Does Trading Several Debts for One Actually Help?", "content_text": "One payment, lower rate — the pitch sounds like a pure win. But a consolidation loan carries the same term-reset trap as refinancing, now spread across every debt you own, and it resets the psychological finish line on whichever one was closest to paid off. This lesson makes both effects visible.", "summary": "One payment, lower rate — the pitch sounds like a pure win. But a consolidation loan carries the same term-reset trap as refinancing, now spread across every debt you own, and it resets the psychological finish line on whichever one was closest to paid off. This lesson makes both effects visible.", "tags": [ "debt", "credit-cards", "loans", "interest", "amortization" ] }, { "id": "https://parallelogramist.com/learn/balance-transfer/", "url": "https://parallelogramist.com/learn/balance-transfer/", "title": "Balance Transfer: The 0%-APR Card That Becomes a Trap If You Miss the Deadline", "content_text": "A promotional balance-transfer card offers 0% interest for a fixed window and charges an upfront fee to move your debt onto it. Pay it off before the window closes and the fee is nearly the whole cost. Miss the deadline — even because you never bumped the payment up from the teaser amount — and the reverted rate can cost more than never transferring at all.", "summary": "A promotional balance-transfer card offers 0% interest for a fixed window and charges an upfront fee to move your debt onto it. Pay it off before the window closes and the fee is nearly the whole cost. Miss the deadline — even because you never bumped the payment up from the teaser amount — and the reverted rate can cost more than never transferring at all.", "tags": [ "debt", "credit-cards", "interest", "amortization", "loans" ] }, { "id": "https://parallelogramist.com/learn/payday-loans/", "url": "https://parallelogramist.com/learn/payday-loans/", "title": "Payday Loans: What a 'Small' Two-Week Fee Actually Costs", "content_text": "A payday loan's fee looks small in dollars — often $15 per $100 borrowed. Annualize that fee over the loan's actual two-week term and it becomes a true APR north of 300–400%. Miss the due date and most lenders let you 'roll over' the loan: pay the fee again, extend two more weeks, and the principal never shrinks by a cent. This lesson makes the annualized rate and the rollover spiral visible, raced against a personal loan sized to the same amount.", "summary": "A payday loan's fee looks small in dollars — often $15 per $100 borrowed. Annualize that fee over the loan's actual two-week term and it becomes a true APR north of 300–400%. Miss the due date and most lenders let you 'roll over' the loan: pay the fee again, extend two more weeks, and the principal never shrinks by a cent. This lesson makes the annualized rate and the rollover spiral visible, raced against a personal loan sized to the same amount.", "tags": [ "debt", "loans", "interest", "apr", "credit-cards" ] }, { "id": "https://parallelogramist.com/learn/401k-loan/", "url": "https://parallelogramist.com/learn/401k-loan/", "title": "Borrowing From Your Own 401(k): The Loan That Sounds Free", "content_text": "A 401(k) loan needs no credit check, and the interest you pay goes back into your own account — which sounds free. It isn't: the money is out of the market while it's gone, the interest is taxed twice, and leaving your job can make the whole balance due almost immediately. This lesson races your real account balance against what it would be worth if you'd never touched it.", "summary": "A 401(k) loan needs no credit check, and the interest you pay goes back into your own account — which sounds free. It isn't: the money is out of the market while it's gone, the interest is taxed twice, and leaving your job can make the whole balance due almost immediately. This lesson races your real account balance against what it would be worth if you'd never touched it.", "tags": [ "debt", "loans", "retirement", "401k", "interest" ] }, { "id": "https://parallelogramist.com/learn/cosigning-a-loan/", "url": "https://parallelogramist.com/learn/cosigning-a-loan/", "title": "Co-Signing a Loan: Vouching for Someone Else's Debt", "content_text": "Cosigning feels like a favor with no downside — you're not the one borrowing. You're wrong: a cosigner is EQUALLY on the hook for the full balance, and it shows up on YOUR credit and debt-to-income the moment you sign, not just if something goes wrong. This lesson prices both costs — the guaranteed one and the risky one.", "summary": "Cosigning feels like a favor with no downside — you're not the one borrowing. You're wrong: a cosigner is EQUALLY on the hook for the full balance, and it shows up on YOUR credit and debt-to-income the moment you sign, not just if something goes wrong. This lesson prices both costs — the guaranteed one and the risky one.", "tags": [ "debt", "credit", "loans", "cosigning", "risk" ] }, { "id": "https://parallelogramist.com/learn/bank-accounts/", "url": "https://parallelogramist.com/learn/bank-accounts/", "title": "Bank Accounts: Where Your Cash Should Actually Sit", "content_text": "Checking, savings, high-yield savings, CDs — they look interchangeable and aren't. Park the same balance in all four at once and watch the gap open up, then see the catch that makes a CD worth it (or not).", "summary": "Checking, savings, high-yield savings, CDs — they look interchangeable and aren't. Park the same balance in all four at once and watch the gap open up, then see the catch that makes a CD worth it (or not).", "tags": [ "saving", "banking", "interest", "cash", "inflation" ] }, { "id": "https://parallelogramist.com/learn/sinking-funds/", "url": "https://parallelogramist.com/learn/sinking-funds/", "title": "Sinking Funds: Saving Monthly for the Bill You Know Is Coming", "content_text": "Some expenses aren't emergencies — they're appointments. A car will need new tires, the insurance premium renews every year, December always arrives. A sinking fund saves a little every month so the bill is just a bill, not a scramble.", "summary": "Some expenses aren't emergencies — they're appointments. A car will need new tires, the insurance premium renews every year, December always arrives. A sinking fund saves a little every month so the bill is just a bill, not a scramble.", "tags": [ "saving", "budgeting", "cash-flow", "debt", "planning" ] }, { "id": "https://parallelogramist.com/learn/real-returns/", "url": "https://parallelogramist.com/learn/real-returns/", "title": "Real Returns: What Your Money Is Actually Earning", "content_text": "A 7% return sounds great until inflation takes its cut. The real return — what's left after prices rise — is the only number that tells you whether your money is getting ahead. Watch three assets grow in today's dollars and see a positive return quietly turn negative.", "summary": "A 7% return sounds great until inflation takes its cut. The real return — what's left after prices rise — is the only number that tells you whether your money is getting ahead. Watch three assets grow in today's dollars and see a positive return quietly turn negative.", "tags": [ "inflation", "investing", "interest", "saving", "returns" ] }, { "id": "https://parallelogramist.com/learn/windfall/", "url": "https://parallelogramist.com/learn/windfall/", "title": "You Just Got a Windfall: Where Should It Go?", "content_text": "A bonus, a tax refund, an inheritance — a chunk of money lands in your lap. Spend it, save it, invest it, or kill some debt? A windfall is a one-time chance to BUY A RATE. Race the same lump down four destinations and watch which one wins.", "summary": "A bonus, a tax refund, an inheritance — a chunk of money lands in your lap. Spend it, save it, invest it, or kill some debt? A windfall is a one-time chance to BUY A RATE. Race the same lump down four destinations and watch which one wins.", "tags": [ "saving", "investing", "debt", "opportunity-cost", "behavior" ] }, { "id": "https://parallelogramist.com/learn/dollar-cost-averaging/", "url": "https://parallelogramist.com/learn/dollar-cost-averaging/", "title": "Dollar-Cost Averaging: Investing Through the Ups and Downs", "content_text": "You have a lump of money to invest. Drop it in all at once, or feed it in a bit at a time? Dollar-cost averaging spreads your buys across the market's swings so you buy more when it's cheap and less when it's dear. Race it against going all-in and see exactly when each one wins.", "summary": "You have a lump of money to invest. Drop it in all at once, or feed it in a bit at a time? Dollar-cost averaging spreads your buys across the market's swings so you buy more when it's cheap and less when it's dear. Race it against going all-in and see exactly when each one wins.", "tags": [ "investing", "returns", "saving", "risk", "market-timing" ] }, { "id": "https://parallelogramist.com/learn/risk-return/", "url": "https://parallelogramist.com/learn/risk-return/", "title": "Risk & Return: Volatility Is the Price of Growth", "content_text": "Why can't you get stock-market returns at savings-account safety? Because the higher an asset's expected return, the wider the range of outcomes you have to accept to get it. Drag an investment from savings up to aggressive and watch the cone of possible futures fan out — that widening cone IS the risk you're paying for the reward.", "summary": "Why can't you get stock-market returns at savings-account safety? Because the higher an asset's expected return, the wider the range of outcomes you have to accept to get it. Drag an investment from savings up to aggressive and watch the cone of possible futures fan out — that widening cone IS the risk you're paying for the reward.", "tags": [ "investing", "risk", "returns", "volatility", "saving" ] }, { "id": "https://parallelogramist.com/learn/volatility-drag/", "url": "https://parallelogramist.com/learn/volatility-drag/", "title": "Why a 50% Loss Needs a 100% Gain: Volatility Drag", "content_text": "A '7% average return' almost never compounds at 7%. Because a loss bites a bigger base than the next equal-sized gain builds back, the bumpier the ride, the less you actually keep. This lesson makes the gap between the average and the reality visible — and shows why a steadier path can leave you richer than a wilder one with the very same average.", "summary": "A '7% average return' almost never compounds at 7%. Because a loss bites a bigger base than the next equal-sized gain builds back, the bumpier the ride, the less you actually keep. This lesson makes the gap between the average and the reality visible — and shows why a steadier path can leave you richer than a wilder one with the very same average.", "tags": [ "volatility", "risk", "investing", "compounding", "returns" ] }, { "id": "https://parallelogramist.com/learn/diversification/", "url": "https://parallelogramist.com/learn/diversification/", "title": "Diversification: The Closest Thing to a Free Lunch", "content_text": "Risk and return are supposed to be linked — more of one means more of the other. Diversification is the one trick that bends that rule: combine assets whose ups and downs don't move in lockstep and their bad years partly cancel, narrowing your range of outcomes without giving up the expected return. Drag two assets from 'move together' to 'move apart' and watch the cone of futures pull inward for free.", "summary": "Risk and return are supposed to be linked — more of one means more of the other. Diversification is the one trick that bends that rule: combine assets whose ups and downs don't move in lockstep and their bad years partly cancel, narrowing your range of outcomes without giving up the expected return. Drag two assets from 'move together' to 'move apart' and watch the cone of futures pull inward for free.", "tags": [ "investing", "diversification", "risk", "portfolio", "returns" ] }, { "id": "https://parallelogramist.com/learn/sequence-of-returns/", "url": "https://parallelogramist.com/learn/sequence-of-returns/", "title": "Sequence of Returns: Why a Crash Hurts More at the Finish Line", "content_text": "A market's average return doesn't tell you everything. When you're adding money every year, WHEN a crash hits changes where you end up — and counterintuitively, a young saver should want the crash early. Slide the same crash from early to late and watch your finish move.", "summary": "A market's average return doesn't tell you everything. When you're adding money every year, WHEN a crash hits changes where you end up — and counterintuitively, a young saver should want the crash early. Slide the same crash from early to late and watch your finish move.", "tags": [ "investing", "returns", "risk", "retirement", "saving" ] }, { "id": "https://parallelogramist.com/learn/index-funds/", "url": "https://parallelogramist.com/learn/index-funds/", "title": "Index Funds, ETFs & the Quiet Cost of Fees", "content_text": "An index fund buys the whole market in one click, and it charges almost nothing to do it. That 'almost nothing' is the most important number in investing: a 1%-a-year fee looks trivial next to a 7% return, but over a few decades it compounds into a startling slice of your final balance. Drag the fee and watch a fortune leak out the side.", "summary": "An index fund buys the whole market in one click, and it charges almost nothing to do it. That 'almost nothing' is the most important number in investing: a 1%-a-year fee looks trivial next to a 7% return, but over a few decades it compounds into a startling slice of your final balance. Drag the fee and watch a fortune leak out the side.", "tags": [ "investing", "index-funds", "fees", "diversification", "returns" ] }, { "id": "https://parallelogramist.com/learn/asset-allocation/", "url": "https://parallelogramist.com/learn/asset-allocation/", "title": "Asset Allocation: How Much in Stocks vs Bonds?", "content_text": "Diversification said to mix assets that don't move in lockstep. Asset allocation is the follow-up: in what proportions? Sweep the stock/bond split and the trade-off draws itself as a curve — and that curve hides a surprise. Near the all-bonds end it bows the 'wrong' way: adding a slice of stocks makes the portfolio both safer AND higher-returning. 'All bonds' is not the safest place to be. Drag the mix and find the lowest-risk point, then decide how far past it your time horizon lets you go.", "summary": "Diversification said to mix assets that don't move in lockstep. Asset allocation is the follow-up: in what proportions? Sweep the stock/bond split and the trade-off draws itself as a curve — and that curve hides a surprise. Near the all-bonds end it bows the 'wrong' way: adding a slice of stocks makes the portfolio both safer AND higher-returning. 'All bonds' is not the safest place to be. Drag the mix and find the lowest-risk point, then decide how far past it your time horizon lets you go.", "tags": [ "investing", "asset-allocation", "diversification", "portfolio", "risk", "returns" ] }, { "id": "https://parallelogramist.com/learn/stocks/", "url": "https://parallelogramist.com/learn/stocks/", "title": "Stocks: Price, Dividends & What 'Total Return' Really Means", "content_text": "A stock pays you two ways: the price can rise, and the company can hand you cash dividends. Add them up and you get total return — the only number that actually measures how a stock treated you. The twist: reinvesting those dividends, not the price chart, is where most of the long-run money comes from. Drag the price growth and the dividend yield and watch the two lines split apart.", "summary": "A stock pays you two ways: the price can rise, and the company can hand you cash dividends. Add them up and you get total return — the only number that actually measures how a stock treated you. The twist: reinvesting those dividends, not the price chart, is where most of the long-run money comes from. Drag the price growth and the dividend yield and watch the two lines split apart.", "tags": [ "investing", "stocks", "dividends", "returns", "compound-interest" ] }, { "id": "https://parallelogramist.com/learn/bonds/", "url": "https://parallelogramist.com/learn/bonds/", "title": "Bonds: Why Their Prices Move Backwards", "content_text": "Buy a bond and you become a lender: you hand over cash, collect a fixed coupon, and get your money back at maturity. The famous twist is that a bond's price moves the OPPOSITE way to interest rates — rates up, prices down — and the longer the bond, the harder it swings. Drag a market-rate slider and watch three bonds reprice in real time.", "summary": "Buy a bond and you become a lender: you hand over cash, collect a fixed coupon, and get your money back at maturity. The famous twist is that a bond's price moves the OPPOSITE way to interest rates — rates up, prices down — and the longer the bond, the harder it swings. Drag a market-rate slider and watch three bonds reprice in real time.", "tags": [ "investing", "bonds", "interest-rates", "yield", "risk" ] }, { "id": "https://parallelogramist.com/learn/retirement-accounts/", "url": "https://parallelogramist.com/learn/retirement-accounts/", "title": "Retirement Accounts & the Employer Match: The Closest Thing to Free Money", "content_text": "Two moves do most of the heavy lifting in building wealth: grabbing your employer's 401(k) match (an instant, risk-free return nothing in the market can touch) and letting money compound inside a tax-advantaged account instead of a taxable one. Drag the contribution, the match, and your tax rates and watch the same dollars grow three ways.", "summary": "Two moves do most of the heavy lifting in building wealth: grabbing your employer's 401(k) match (an instant, risk-free return nothing in the market can touch) and letting money compound inside a tax-advantaged account instead of a taxable one. Drag the contribution, the match, and your tax rates and watch the same dollars grow three ways.", "tags": [ "investing", "retirement", "taxes", "compound-interest", "employer-match" ] }, { "id": "https://parallelogramist.com/learn/roth-vs-traditional/", "url": "https://parallelogramist.com/learn/roth-vs-traditional/", "title": "Roth vs. Traditional: Pay the Tax Now, or Later?", "content_text": "Every 401(k) and IRA asks the same question: pay tax on this money now (Roth) or defer it and pay whatever your rate turns out to be later (Traditional)? Most comparisons quietly get it wrong by ignoring what a Traditional saver does with the tax break — invest it and the two are an exact bet on ONE thing: your tax rate now vs. later. Skip that step and Traditional looks worse than it really is.", "summary": "Every 401(k) and IRA asks the same question: pay tax on this money now (Roth) or defer it and pay whatever your rate turns out to be later (Traditional)? Most comparisons quietly get it wrong by ignoring what a Traditional saver does with the tax break — invest it and the two are an exact bet on ONE thing: your tax rate now vs. later. Skip that step and Traditional looks worse than it really is.", "tags": [ "retirement", "taxes", "investing", "compound-interest", "401k" ] }, { "id": "https://parallelogramist.com/learn/hsa/", "url": "https://parallelogramist.com/learn/hsa/", "title": "The HSA: The Only Account With a Triple Tax Advantage", "content_text": "A Health Savings Account is the most tax-advantaged account in America — money goes in untaxed, grows untaxed, and comes out untaxed for medical costs. Its most overlooked power is the 'stealth IRA' move: pay today's medical bills from cash, keep the receipts, and let the HSA compound for decades. Drag the simulator and watch the gap between spending it as you go and leaving it invested.", "summary": "A Health Savings Account is the most tax-advantaged account in America — money goes in untaxed, grows untaxed, and comes out untaxed for medical costs. Its most overlooked power is the 'stealth IRA' move: pay today's medical bills from cash, keep the receipts, and let the HSA compound for decades. Drag the simulator and watch the gap between spending it as you go and leaving it invested.", "tags": [ "hsa", "taxes", "retirement", "investing", "health", "compound-interest" ] }, { "id": "https://parallelogramist.com/learn/401k-cashout/", "url": "https://parallelogramist.com/learn/401k-cashout/", "title": "Cashing Out a 401(k) When You Leave a Job — vs. Rolling It Over", "content_text": "Leaving a job with money in the old 401(k) forces a choice: roll it into an IRA or the new plan, or cash it out. Cashing out feels like 'at least I get some of it now' — it's actually two separate costs, one due today in tax and penalty, one that only shows up decades later as growth you never get back.", "summary": "Leaving a job with money in the old 401(k) forces a choice: roll it into an IRA or the new plan, or cash it out. Cashing out feels like 'at least I get some of it now' — it's actually two separate costs, one due today in tax and penalty, one that only shows up decades later as growth you never get back.", "tags": [ "401k", "retirement", "taxes", "investing", "opportunity-cost" ] }, { "id": "https://parallelogramist.com/learn/job-offers/", "url": "https://parallelogramist.com/learn/job-offers/", "title": "Two Job Offers: Compare Total Comp, Not Salary", "content_text": "The bigger salary is not always the better offer. Once you net out taxes, the 401(k) match, your health premium, and the cost of living where you'd work, a smaller paycheck can leave you thousands of dollars a year better off. Drop both offers in, watch the headline ranking flip, and learn to compare what actually lands in your life.", "summary": "The bigger salary is not always the better offer. Once you net out taxes, the 401(k) match, your health premium, and the cost of living where you'd work, a smaller paycheck can leave you thousands of dollars a year better off. Drop both offers in, watch the headline ranking flip, and learn to compare what actually lands in your life.", "tags": [ "income", "taxes", "fica", "retirement", "saving" ] }, { "id": "https://parallelogramist.com/learn/taxes/", "url": "https://parallelogramist.com/learn/taxes/", "title": "Tax Brackets: Your Bracket Is Not Your Tax Rate", "content_text": "The most expensive money myth in America is that a raise can push you into a higher bracket and leave you with less. It can't. See why your marginal rate (your bracket) and your effective rate (what you actually pay) are two different numbers — and how deductions and credits move them in completely different ways.", "summary": "The most expensive money myth in America is that a raise can push you into a higher bracket and leave you with less. It can't. See why your marginal rate (your bracket) and your effective rate (what you actually pay) are two different numbers — and how deductions and credits move them in completely different ways.", "tags": [ "taxes", "income", "marginal-rate", "effective-rate", "deductions", "credits" ] }, { "id": "https://parallelogramist.com/learn/benefits-cliff/", "url": "https://parallelogramist.com/learn/benefits-cliff/", "title": "The Benefits Cliff: When a Raise Leaves You Worse Off", "content_text": "The tax-bracket lesson proved a raise can never lower your take-home. This is its dark mirror. Once you add the benefits a working family actually receives — Medicaid, childcare help, an ACA subsidy — a raise CAN make you poorer, because a benefit that cuts off the instant you cross an income line costs thousands for one extra dollar of pay. Drag your income across the cliff and watch your net resources fall.", "summary": "The tax-bracket lesson proved a raise can never lower your take-home. This is its dark mirror. Once you add the benefits a working family actually receives — Medicaid, childcare help, an ACA subsidy — a raise CAN make you poorer, because a benefit that cuts off the instant you cross an income line costs thousands for one extra dollar of pay. Drag your income across the cliff and watch your net resources fall.", "tags": [ "taxes", "benefits", "marginal-rate", "income", "eitc", "decisions" ] }, { "id": "https://parallelogramist.com/learn/home-affordability/", "url": "https://parallelogramist.com/learn/home-affordability/", "title": "How Much House Can You Actually Afford? The 28/36 Rule", "content_text": "A lender doesn't approve you for a price — it approves you for a payment. Two debt-to-income ratios (28% and 36%) quietly set the ceiling, and the interest rate swings your buying power by tens of thousands at the very same income. Work backwards from your paycheck to the real number, and see exactly how your other debts shrink it.", "summary": "A lender doesn't approve you for a price — it approves you for a payment. Two debt-to-income ratios (28% and 36%) quietly set the ceiling, and the interest rate swings your buying power by tens of thousands at the very same income. Work backwards from your paycheck to the real number, and see exactly how your other debts shrink it.", "tags": [ "housing", "mortgage", "debt", "budgeting", "big-decisions" ] }, { "id": "https://parallelogramist.com/learn/rent-vs-buy/", "url": "https://parallelogramist.com/learn/rent-vs-buy/", "title": "Rent vs Buy: It's a Break-Even, Not a Battle", "content_text": "Buying a home is not automatically smarter than 'throwing money away on rent.' It's a break-even that depends on how long you stay — because a renter who invests the down payment and the monthly cost difference can stay ahead for years. Drag the price, rent, mortgage rate, and stay length and watch the moment buying overtakes renting move.", "summary": "Buying a home is not automatically smarter than 'throwing money away on rent.' It's a break-even that depends on how long you stay — because a renter who invests the down payment and the monthly cost difference can stay ahead for years. Drag the price, rent, mortgage rate, and stay length and watch the moment buying overtakes renting move.", "tags": [ "housing", "real-estate", "mortgages", "investing", "opportunity-cost" ] }, { "id": "https://parallelogramist.com/learn/insurance/", "url": "https://parallelogramist.com/learn/insurance/", "title": "Insurance: Buy Term and Invest the Difference", "content_text": "Insurance is risk transfer — you pay a small, certain premium so someone else absorbs a rare, ruinous loss. That makes it worth buying for catastrophes you couldn't self-fund, and a bad deal for losses you could shrug off. The sharpest version of the rule is life insurance: cheap 'term' covers you for a fixed window, while pricey 'whole life' bundles coverage with a slow-growing savings account. Drag the premiums and watch buy-the-cheap-term-and-invest-the-difference pull far ahead — and grow your own savings until you no longer need a policy at all.", "summary": "Insurance is risk transfer — you pay a small, certain premium so someone else absorbs a rare, ruinous loss. That makes it worth buying for catastrophes you couldn't self-fund, and a bad deal for losses you could shrug off. The sharpest version of the rule is life insurance: cheap 'term' covers you for a fixed window, while pricey 'whole life' bundles coverage with a slow-growing savings account. Drag the premiums and watch buy-the-cheap-term-and-invest-the-difference pull far ahead — and grow your own savings until you no longer need a policy at all.", "tags": [ "insurance", "risk", "investing", "opportunity-cost", "compound-interest" ] }, { "id": "https://parallelogramist.com/learn/hdhp-vs-ppo/", "url": "https://parallelogramist.com/learn/hdhp-vs-ppo/", "title": "HDHP + HSA vs PPO: Picking a Health Plan Without Guessing", "content_text": "Every open enrollment, most employees face the same confusing choice: a High-Deductible Health Plan (HDHP) with a low premium and a big deductible, paired with a tax-advantaged HSA — or a PPO with a high premium and a low deductible. Which is cheaper depends entirely on how much you actually spend on care this year. Drag the simulator's spending slider and watch the winner flip at the break-even — the number no plan comparison chart at open enrollment ever shows you.", "summary": "Every open enrollment, most employees face the same confusing choice: a High-Deductible Health Plan (HDHP) with a low premium and a big deductible, paired with a tax-advantaged HSA — or a PPO with a high premium and a low deductible. Which is cheaper depends entirely on how much you actually spend on care this year. Drag the simulator's spending slider and watch the winner flip at the break-even — the number no plan comparison chart at open enrollment ever shows you.", "tags": [ "health-insurance", "hsa", "insurance", "taxes", "benefits" ] }, { "id": "https://parallelogramist.com/learn/disability-insurance/", "url": "https://parallelogramist.com/learn/disability-insurance/", "title": "Disability Insurance: Insuring Your Paycheck, Not Just Your Stuff", "content_text": "Most people insure the car and the house but carry nothing on the asset that pays for both: their ability to work. A disability policy replaces a capped fraction of gross pay — commonly around 60% — and what that's really worth turns on a genuinely counterintuitive tax rule: if your employer pays the premium, the benefit check is taxable; if you pay it yourself with after-tax dollars, the check is tax-free. Drag the simulator and watch the 'free' workplace plan quietly pay less than the one you bought — exactly when you'd need it.", "summary": "Most people insure the car and the house but carry nothing on the asset that pays for both: their ability to work. A disability policy replaces a capped fraction of gross pay — commonly around 60% — and what that's really worth turns on a genuinely counterintuitive tax rule: if your employer pays the premium, the benefit check is taxable; if you pay it yourself with after-tax dollars, the check is tax-free. Drag the simulator and watch the 'free' workplace plan quietly pay less than the one you bought — exactly when you'd need it.", "tags": [ "insurance", "income", "taxes", "risk" ] }, { "id": "https://parallelogramist.com/learn/mortgages/", "url": "https://parallelogramist.com/learn/mortgages/", "title": "Mortgage Points: Buying Down Your Rate Is a Break-Even", "content_text": "Paying discount points lowers your mortgage rate — but you pay cash up front for a saving that arrives a little each month. Whether it's worth it comes down to one number: how long you keep the loan. Drag the loan size, rate, and points and watch the break-even move.", "summary": "Paying discount points lowers your mortgage rate — but you pay cash up front for a saving that arrives a little each month. Whether it's worth it comes down to one number: how long you keep the loan. Drag the loan size, rate, and points and watch the break-even move.", "tags": [ "mortgages", "housing", "interest", "loans", "break-even" ] }, { "id": "https://parallelogramist.com/learn/mortgages-arm/", "url": "https://parallelogramist.com/learn/mortgages-arm/", "title": "Adjustable-Rate Mortgages: The Teaser That Resets", "content_text": "An ARM dangles a low intro rate, then resets it toward the market — and your payment re-amortizes higher. It's a bet you'll be gone before the reset bites. Drag the teaser, the index, and the intro length and watch a low payment jump above the fixed loan.", "summary": "An ARM dangles a low intro rate, then resets it toward the market — and your payment re-amortizes higher. It's a bet you'll be gone before the reset bites. Drag the teaser, the index, and the intro length and watch a low payment jump above the fixed loan.", "tags": [ "mortgages", "housing", "interest", "loans", "risk" ] }, { "id": "https://parallelogramist.com/learn/refinance/", "url": "https://parallelogramist.com/learn/refinance/", "title": "Refinancing a Loan: When Does It Actually Pay Off?", "content_text": "A lower rate looks like free money — but refinancing has an up-front price, and it usually resets the clock. This lesson shows the two numbers that decide it: the break-even month, and the trap where a smaller payment quietly costs you more.", "summary": "A lower rate looks like free money — but refinancing has an up-front price, and it usually resets the clock. This lesson shows the two numbers that decide it: the break-even month, and the trap where a smaller payment quietly costs you more.", "tags": [ "mortgages", "debt", "loans", "interest", "homeownership" ] }, { "id": "https://parallelogramist.com/learn/heloc/", "url": "https://parallelogramist.com/learn/heloc/", "title": "HELOC: Borrowing Against Your Home", "content_text": "A home-equity line of credit is cheap, secured debt with a structure that hides a payment cliff: interest-only for years, then a sudden jump to a fully amortizing payment. This lesson makes the jump visible — and the collateral risk explicit.", "summary": "A home-equity line of credit is cheap, secured debt with a structure that hides a payment cliff: interest-only for years, then a sudden jump to a fully amortizing payment. This lesson makes the jump visible — and the collateral risk explicit.", "tags": [ "mortgages", "debt", "homeownership", "interest", "loans" ] }, { "id": "https://parallelogramist.com/learn/retirement-planning/", "url": "https://parallelogramist.com/learn/retirement-planning/", "title": "Retirement Planning: Will Your Money Last?", "content_text": "Saving for retirement asks how big a pile you can build. Spending it down asks a harder question: will the pile last as long as you do? This lesson is about the withdrawal side — the 4% rule, the 25× 'number' it implies, and the sequence-of-returns risk that makes spending a portfolio fundamentally different from growing one. Drag your nest egg, your spending, and your market and watch a Monte-Carlo cone of futures show how often the money runs out.", "summary": "Saving for retirement asks how big a pile you can build. Spending it down asks a harder question: will the pile last as long as you do? This lesson is about the withdrawal side — the 4% rule, the 25× 'number' it implies, and the sequence-of-returns risk that makes spending a portfolio fundamentally different from growing one. Drag your nest egg, your spending, and your market and watch a Monte-Carlo cone of futures show how often the money runs out.", "tags": [ "retirement", "fire", "investing", "risk", "withdrawal" ] }, { "id": "https://parallelogramist.com/learn/social-security/", "url": "https://parallelogramist.com/learn/social-security/", "title": "When to Claim Social Security: The Break-Even Bet", "content_text": "Claiming Social Security is a single high-stakes choice almost everyone faces: take a smaller check as early as 62, or wait — up to 70 — for a permanently bigger one. The trade-off is exact. Claim early and the checks are about 30% smaller but you collect more of them; delay and each check grows roughly 8% a year, but fewer arrive. The two paths cross at a break-even age, so the decision is really a bet on how long you'll live. Drag your benefit, your full-retirement age, and your life expectancy to find your own crossover.", "summary": "Claiming Social Security is a single high-stakes choice almost everyone faces: take a smaller check as early as 62, or wait — up to 70 — for a permanently bigger one. The trade-off is exact. Claim early and the checks are about 30% smaller but you collect more of them; delay and each check grows roughly 8% a year, but fewer arrive. The two paths cross at a break-even age, so the decision is really a bet on how long you'll live. Drag your benefit, your full-retirement age, and your life expectancy to find your own crossover.", "tags": [ "retirement", "social-security", "income", "longevity", "claiming" ] }, { "id": "https://parallelogramist.com/learn/savings-rate/", "url": "https://parallelogramist.com/learn/savings-rate/", "title": "Savings Rate: The Shockingly Simple Math of Early Retirement", "content_text": "How long until work is optional? The surprising answer is that it depends almost entirely on one number — your savings rate — and barely at all on your income. A 10% saver works about 50 years; a 50% saver about 17; a 75% saver about 7. Drag the savings rate and watch the years-to-freedom curve plunge, because saving more is a double win: it grows the pile faster AND shrinks the pile you need.", "summary": "How long until work is optional? The surprising answer is that it depends almost entirely on one number — your savings rate — and barely at all on your income. A 10% saver works about 50 years; a 50% saver about 17; a 75% saver about 7. Drag the savings rate and watch the years-to-freedom curve plunge, because saving more is a double win: it grows the pile faster AND shrinks the pile you need.", "tags": [ "fire", "savings", "retirement", "financial-independence", "budgeting", "investing" ] }, { "id": "https://parallelogramist.com/learn/coast-fire/", "url": "https://parallelogramist.com/learn/coast-fire/", "title": "Coast FIRE: The Age You Can Stop Saving and Still Retire On Time", "content_text": "There's a moment, years before you retire, when your invested pile is already big enough that compound growth alone will carry it to your number. After that, saving is optional. This lesson finds that moment — and shows how much earlier it arrives than the finish line.", "summary": "There's a moment, years before you retire, when your invested pile is already big enough that compound growth alone will carry it to your number. After that, saving is optional. This lesson finds that moment — and shows how much earlier it arrives than the finish line.", "tags": [ "fire", "financial-independence", "retirement", "compounding", "investing", "saving" ] }, { "id": "https://parallelogramist.com/learn/college-funding/", "url": "https://parallelogramist.com/learn/college-funding/", "title": "Paying for College: 529 Savings vs the Cost of Student Debt", "content_text": "The same college bill costs wildly different amounts depending on when you pay it. Save ahead in a tax-free 529 and growth covers part of the tab; borrow it as student debt and you pay the sticker price plus years of interest. Drag the simulator and watch the gap.", "summary": "The same college bill costs wildly different amounts depending on when you pay it. Save ahead in a tax-free 529 and growth covers part of the tab; borrow it as student debt and you pay the sticker price plus years of interest. Drag the simulator and watch the gap.", "tags": [ "college", "loans", "debt", "saving", "compounding" ] }, { "id": "https://parallelogramist.com/learn/student-loans/", "url": "https://parallelogramist.com/learn/student-loans/", "title": "Student Loans: Standard vs Income-Driven Repayment (and Forgiveness)", "content_text": "A federal student loan comes with a choice that's worth thousands: pay it off fast on the standard 10-year plan, or cap your payment at a slice of your income and let any leftover balance be forgiven after 20–25 years. The lower payment feels like relief — but it can quietly become a bigger, longer, costlier loan. Drag your income and watch one plan win, then the other.", "summary": "A federal student loan comes with a choice that's worth thousands: pay it off fast on the standard 10-year plan, or cap your payment at a slice of your income and let any leftover balance be forgiven after 20–25 years. The lower payment feels like relief — but it can quietly become a bigger, longer, costlier loan. Drag your income and watch one plan win, then the other.", "tags": [ "debt", "student-loans", "loans", "repayment", "forgiveness", "decisions" ] }, { "id": "https://parallelogramist.com/learn/pay-debt-vs-invest/", "url": "https://parallelogramist.com/learn/pay-debt-vs-invest/", "title": "Pay Down Debt or Invest? The Guaranteed-Return Crossover", "content_text": "You've got a spare $300 a month. Do you throw it at your loan or invest it? There's a clean answer hiding in two numbers — your debt's interest rate and the return you expect to earn. Drag the return until it matches the rate and watch the two strategies become the exact same line.", "summary": "You've got a spare $300 a month. Do you throw it at your loan or invest it? There's a clean answer hiding in two numbers — your debt's interest rate and the return you expect to earn. Drag the return until it matches the rate and watch the two strategies become the exact same line.", "tags": [ "debt", "investing", "saving", "behavior", "budgeting" ] }, { "id": "https://parallelogramist.com/learn/car-buying/", "url": "https://parallelogramist.com/learn/car-buying/", "title": "Buying a Car: New vs Used vs Lease", "content_text": "A car is the second-biggest purchase most people make — and the most-mishandled, because its real cost is invisible on the sticker. The truth: a car costs you what it LOSES in value plus what you pay to BORROW. Race the all-in cost of buying new, buying used, and leasing, and watch the depreciation cliff do its work.", "summary": "A car is the second-biggest purchase most people make — and the most-mishandled, because its real cost is invisible on the sticker. The truth: a car costs you what it LOSES in value plus what you pay to BORROW. Race the all-in cost of buying new, buying used, and leasing, and watch the depreciation cliff do its work.", "tags": [ "spending", "debt", "loans", "opportunity-cost", "depreciation" ] }, { "id": "https://parallelogramist.com/learn/real-estate-investing/", "url": "https://parallelogramist.com/learn/real-estate-investing/", "title": "Real-Estate Investing: Cap Rate, Cash Flow, and the Magic (and Menace) of Leverage", "content_text": "A rental property earns three ways at once — cash flow, appreciation, and your tenant paying down your loan — but the idea that makes (and breaks) real-estate fortunes is leverage: a mortgage lets a fraction of the price control the whole property, multiplying the return on the cash you actually invested. In both directions. Drag the price, rent, down payment, rate, and appreciation and watch financing turn an all-cash return into something much bigger — or much worse.", "summary": "A rental property earns three ways at once — cash flow, appreciation, and your tenant paying down your loan — but the idea that makes (and breaks) real-estate fortunes is leverage: a mortgage lets a fraction of the price control the whole property, multiplying the return on the cash you actually invested. In both directions. Drag the price, rent, down payment, rate, and appreciation and watch financing turn an all-cash return into something much bigger — or much worse.", "tags": [ "real-estate", "investing", "mortgages", "leverage", "opportunity-cost" ] }, { "id": "https://parallelogramist.com/learn/options/", "url": "https://parallelogramist.com/learn/options/", "title": "Options: Calls, Puts, and the Hockey-Stick Payoff", "content_text": "An option is a contract that gives you the right — not the obligation — to buy or sell a stock at a fixed price, for a fixed window of time. That asymmetry produces the famous bent payoff diagrams: capped losses with open-ended gains for buyers, steady premium income with frightening risk for sellers. Drag the strike, premium, and price and watch the four shapes — long call, long put, short call, short put — and the way an option's premium splits into intrinsic value and time value that decays to nothing by expiration.", "summary": "An option is a contract that gives you the right — not the obligation — to buy or sell a stock at a fixed price, for a fixed window of time. That asymmetry produces the famous bent payoff diagrams: capped losses with open-ended gains for buyers, steady premium income with frightening risk for sellers. Drag the strike, premium, and price and watch the four shapes — long call, long put, short call, short put — and the way an option's premium splits into intrinsic value and time value that decays to nothing by expiration.", "tags": [ "options", "investing", "derivatives", "risk-return", "leverage" ] }, { "id": "https://parallelogramist.com/learn/tax-loss-harvest/", "url": "https://parallelogramist.com/learn/tax-loss-harvest/", "title": "Tax-Loss Harvesting: Turning a Loser Into a Tax Break", "content_text": "When an investment is down, you can sell it to 'harvest' the loss — using it to offset your capital gains and a slice of ordinary income, shrinking this year's tax bill — then immediately rebuy comparable exposure so you stay invested. The catch: selling and rebuying resets your cost basis lower, so the eventual sale shows a bigger gain. Drag the loss, your tax rates, and your horizon to see when harvesting is a genuine win, when it's merely a deferral, and how the wash-sale rule can wipe the whole benefit out.", "summary": "When an investment is down, you can sell it to 'harvest' the loss — using it to offset your capital gains and a slice of ordinary income, shrinking this year's tax bill — then immediately rebuy comparable exposure so you stay invested. The catch: selling and rebuying resets your cost basis lower, so the eventual sale shows a bigger gain. Drag the loss, your tax rates, and your horizon to see when harvesting is a genuine win, when it's merely a deferral, and how the wash-sale rule can wipe the whole benefit out.", "tags": [ "taxes", "investing", "tax-loss-harvesting", "capital-gains", "index-funds" ] }, { "id": "https://parallelogramist.com/learn/annuities/", "url": "https://parallelogramist.com/learn/annuities/", "title": "Annuities: Buying Yourself a Paycheck for Life", "content_text": "An income annuity turns a lump sum into a guaranteed monthly check that never stops — even if you live to 100. What you're really buying is longevity insurance: protection against the one financial risk you can't diversify away, outliving your money. The cost is your flexibility and anything left for your heirs. Drag your premium, age, and the return you could earn instead to see exactly when handing an insurer your savings beats keeping and managing them yourself — and when it doesn't.", "summary": "An income annuity turns a lump sum into a guaranteed monthly check that never stops — even if you live to 100. What you're really buying is longevity insurance: protection against the one financial risk you can't diversify away, outliving your money. The cost is your flexibility and anything left for your heirs. Drag your premium, age, and the return you could earn instead to see exactly when handing an insurer your savings beats keeping and managing them yourself — and when it doesn't.", "tags": [ "retirement", "annuities", "insurance", "income", "longevity" ] }, { "id": "https://parallelogramist.com/learn/futures/", "url": "https://parallelogramist.com/learn/futures/", "title": "Futures & Leverage: Controlling a Lot With a Little", "content_text": "A futures contract lets you control a large position by posting only a small slice of it as margin. That is leverage, and it is a double-edged sword: a tiny move in the underlying becomes a huge move on your deposit — in both directions. Drag the leverage, the margin, and the exit price and watch the steep return-on-margin line pull away from the gentle unleveraged baseline, while the liquidation marker shows just how small a move it takes to wipe you out.", "summary": "A futures contract lets you control a large position by posting only a small slice of it as margin. That is leverage, and it is a double-edged sword: a tiny move in the underlying becomes a huge move on your deposit — in both directions. Drag the leverage, the margin, and the exit price and watch the steep return-on-margin line pull away from the gentle unleveraged baseline, while the liquidation marker shows just how small a move it takes to wipe you out.", "tags": [ "futures", "derivatives", "leverage", "risk-return", "margin" ] }, { "id": "https://parallelogramist.com/learn/forex/", "url": "https://parallelogramist.com/learn/forex/", "title": "Foreign Exchange: What a Currency Really Costs to Swap", "content_text": "A currency pair is just a ratio, and the 'exchange rate' you're quoted is never the real one — a markup is baked in, plus often a flat fee. Drag the markup and the fee and watch how much of your money the exchange quietly keeps, on the way out and again on the way back. The hidden lesson: a 'small' 3% spread costs nearly 6% on a round trip, because you pay it twice.", "summary": "A currency pair is just a ratio, and the 'exchange rate' you're quoted is never the real one — a markup is baked in, plus often a flat fee. Drag the markup and the fee and watch how much of your money the exchange quietly keeps, on the way out and again on the way back. The hidden lesson: a 'small' 3% spread costs nearly 6% on a round trip, because you pay it twice.", "tags": [ "forex", "currency", "exchange-rate", "fees-everywhere", "travel" ] }, { "id": "https://parallelogramist.com/learn/crypto/", "url": "https://parallelogramist.com/learn/crypto/", "title": "Crypto & DeFi: The Hidden Cost of Being the Bank", "content_text": "Strip away the hype and crypto is two ideas: a ledger no single company controls, and money you can program. The genuinely novel part — and the part that quietly costs people money — is DeFi, where you can become the exchange by depositing into a liquidity pool. The catch is 'impermanent loss': when the price moves, the pool rebalances and you end up worth less than if you'd just held the tokens. Drag the price and the fee yield and watch whether being the bank actually pays.", "summary": "Strip away the hype and crypto is two ideas: a ledger no single company controls, and money you can program. The genuinely novel part — and the part that quietly costs people money — is DeFi, where you can become the exchange by depositing into a liquidity pool. The catch is 'impermanent loss': when the price moves, the pool rebalances and you end up worth less than if you'd just held the tokens. Drag the price and the fee yield and watch whether being the bank actually pays.", "tags": [ "crypto", "defi", "liquidity-pool", "fees-everywhere", "risk-return" ] }, { "id": "https://parallelogramist.com/learn/behavioral-finance/", "url": "https://parallelogramist.com/learn/behavioral-finance/", "title": "Behavioral Finance: Why We Sell at the Bottom", "content_text": "The biggest threat to your returns isn't the market — it's the panic that makes you sell into a crash and sit in cash through the recovery. Loss aversion and recency bias quietly talk you into bailing out at exactly the wrong moment, and because the market's best days cluster around its worst, missing even a handful of them can gut a decade of compounding. Drag the volatility and the number of months you sat out, and watch a few panicked decisions erase most of your gains.", "summary": "The biggest threat to your returns isn't the market — it's the panic that makes you sell into a crash and sit in cash through the recovery. Loss aversion and recency bias quietly talk you into bailing out at exactly the wrong moment, and because the market's best days cluster around its worst, missing even a handful of them can gut a decade of compounding. Drag the volatility and the number of months you sat out, and watch a few panicked decisions erase most of your gains.", "tags": [ "investing", "risk", "market-timing", "returns", "behavioral-finance" ] }, { "id": "https://parallelogramist.com/learn/scams-and-fraud/", "url": "https://parallelogramist.com/learn/scams-and-fraud/", "title": "Scams & Fraud: Spotting a Too-Good-to-Be-True Return", "content_text": "The fastest way to lose money isn't a market crash — it's handing it to a scam. Almost every financial fraud, from the corner Ponzi to the slickest crypto 'yield' platform, runs on the same engine: a steady, guaranteed, impossibly-high return that's secretly paid out of new investors' deposits. Drag the promised rate and the flow of new money and watch the math do what it always does — open a hole that widens every month and then collapses without warning. Learn the red flags before they cost you.", "summary": "The fastest way to lose money isn't a market crash — it's handing it to a scam. Almost every financial fraud, from the corner Ponzi to the slickest crypto 'yield' platform, runs on the same engine: a steady, guaranteed, impossibly-high return that's secretly paid out of new investors' deposits. Drag the promised rate and the flow of new money and watch the math do what it always does — open a hole that widens every month and then collapses without warning. Learn the red flags before they cost you.", "tags": [ "scams", "fraud", "risk", "behavioral-finance", "returns" ] }, { "id": "https://parallelogramist.com/learn/fees-everywhere/", "url": "https://parallelogramist.com/learn/fees-everywhere/", "title": "Fees Everywhere: The Costs That Stack", "content_text": "You don't pay one investing fee — you pay a stack of them. A fund's expense ratio, an advisor's percent-of-assets fee, and the trading and spread costs baked into every transaction all come off the same return, so they add up into one all-in drag. Each looks small alone; together they can quietly eat a third or more of your lifetime balance. Drag each fee and watch the slices stack into one fortune-sized band.", "summary": "You don't pay one investing fee — you pay a stack of them. A fund's expense ratio, an advisor's percent-of-assets fee, and the trading and spread costs baked into every transaction all come off the same return, so they add up into one all-in drag. Each looks small alone; together they can quietly eat a third or more of your lifetime balance. Drag each fee and watch the slices stack into one fortune-sized band.", "tags": [ "investing", "fees", "index-funds", "returns", "compound-interest" ] }, { "id": "https://parallelogramist.com/learn/capital-gains/", "url": "https://parallelogramist.com/learn/capital-gains/", "title": "Capital Gains: Why Holding On (and Trading Less) Beats the Tax", "content_text": "The IRS taxes a gain you held over a year at a far lower rate than one you flipped in months — and every time you sell, you hand over tax that could have kept compounding for you. Drag the simulator to watch a buy-and-hold pot pull away from the same money churned and taxed each year, and see exactly what overtrading costs.", "summary": "The IRS taxes a gain you held over a year at a far lower rate than one you flipped in months — and every time you sell, you hand over tax that could have kept compounding for you. Drag the simulator to watch a buy-and-hold pot pull away from the same money churned and taxed each year, and see exactly what overtrading costs.", "tags": [ "taxes", "investing", "behavioral-finance", "stocks", "compound-interest" ] }, { "id": "https://parallelogramist.com/learn/lifestyle-creep/", "url": "https://parallelogramist.com/learn/lifestyle-creep/", "title": "Lifestyle Creep: Bank Your Raises or Spend Them?", "content_text": "Two people earn the exact same paychecks over a career — same starting pay, same raises, same starting savings rate. The only difference is what they do with each raise. One ends up free; the other runs on a treadmill their whole life. Slide what share of every raise you bank and watch the two paths split apart.", "summary": "Two people earn the exact same paychecks over a career — same starting pay, same raises, same starting savings rate. The only difference is what they do with each raise. One ends up free; the other runs on a treadmill their whole life. Slide what share of every raise you bank and watch the two paths split apart.", "tags": [ "behavior", "saving", "income", "budgeting", "retirement" ] } ] }