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How Banks Actually Make Money From Your Deposits

Money Basics • Beginner Investing • 6 min

What this lesson is about

Your deposit doesn't sit in a vault with your name on it. Banks lend most of it out at a higher rate than they pay you, and the gap is their business model.

2 parts · a quick check after each · then the quiz

Part 1 of 2

When, you, deposit, $1,000, into, a, bank,, that, money, doesn't, sit, in, a, vault, with, your, name, taped, to, it., Banks, keep, only, a, portion, of, deposits, readily, available, and, lend, most, of, the, rest, out, to, other, customers, as, mortgages,, car, loans,, business, loans,, and, credit, card, balances., This, is, called, fractional, reserve, banking,, and, it's, the, foundation, of, how, a, traditional, bank, actually, earns, money.

The, core, of, the, business, is, the, spread, between, two, interest, rates:, what, the, bank, pays, you, to, keep, your, money, there,, and, what, it, charges, someone, else, to, borrow, it., A, basic, savings, or, checking, account, has, often, paid, a, fraction, of, a, percent,, while, a, 30-year, mortgage, in, the, mid-2020s, has, typically, charged, somewhere, around, 6., 7%,, and, average, credit, card, interest, rates, have, run, well, above, 20%., That, gap., Called, the, net, interest, margin., Is, a, bank's, primary, source, of, profit.

How a deposit becomes more moneyOne deposit, lent on again and again.

Quick check

When you deposit money into a bank, what does the bank typically do with most of it?

Part 2 of 2

Insider, Angle:, this, system, depends, on, the, fact, that, not, every, depositor, withdraws, their, money, at, the, same, time,, which, is, exactly, what, makes, bank, runs, dangerous,, if, enough, people, try, to, pull, their, money, out, at, once,, a, bank, can, genuinely, run, short,, since, most, of, it, is, already, lent, out., That's, precisely, why, the, FDIC, (Federal, Deposit, Insurance, Corporation), exists:, created, in, 1933, after, thousands, of, bank, failures, during, the, Great, Depression, wiped, out, depositors', savings,, it, now, insures, eligible, deposits, up, to, $250,000, per, depositor,, per, insured, bank,, specifically, to, prevent, panic-driven, bank, runs, by, guaranteeing, your, money, is, safe, even, if, the, bank, itself, gets, into, trouble.
Try, This:, Look, up, your, own, bank's, current, savings, account, interest, rate,, then, look, up, the, average, 30-year, mortgage, rate, or, average, credit, card, APR, being, reported, right, now., Calculate, the, gap, between, what, the, bank, pays, you, and, what, it, charges, borrowers.

Quick check

What is the "net interest margin," in simple terms?

Quiz

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