inflation

Money only matters for what it can buy, and inflation slowly shrinks that. The key distinction is nominal (the number on the statement) versus real (what it actually purchases). Drag the simulator and watch a 'growing' balance lose ground when its return can't outrun inflation.

Not all places to keep cash are equal. A checking account pays almost nothing, a big-bank savings account barely more, a high-yield savings account (HYSA) can pay roughly ten times as much for the same instant access and the same FDIC insurance, and a CD pays a little more still — but only if you lock the money up and don't touch it. The simulator grows one balance in all four at once so you can see the idle-cash cost of the wrong account, then drag a slider to break the CD early and watch the withdrawal penalty erase its edge. The durable lesson: match the account to how soon you'll need the money — liquidity has value, and leaving cash in checking is a quiet, recurring tax.

The return on your money has two parts: the headline (nominal) rate the statement shows, and the real rate left after inflation eats its share. They can disagree completely — a savings account paying 1% while prices rise 3% has a positive nominal return and a negative real one, so the balance grows on paper while it buys less every year. This lesson separates the two. The simulator grows the same amount in cash, bonds, and stocks but draws every line in real, inflation-adjusted dollars, with a break-even line marking where purchasing power holds steady. Drag inflation up and watch the slow earners cross below it. The durable lesson: judge any return by what's left after inflation, because the nominal number alone can't tell you whether you're winning.