1. Quick Summary
A bank accepts deposits, keeps them safe, lets you pay and transfer, and uses most of the money to make loans to others.
It earns profit from the interest gap: charging borrowers a bit more than it pays savers.
2. What It Means
Your bank balance is mostly a record, not a pile of your exact bills sitting in a vault.
Banks turn idle savings into active loans that fund homes, businesses, and growth.
3. Why It Happens
Not everyone withdraws at once, so banks keep only a fraction of deposits as cash and lend the rest, a system called fractional reserve banking.
Loans create new money in the form of deposits when the borrowed funds are spent and re-deposited elsewhere.
Regulators and deposit insurance exist because a sudden rush of withdrawals (a ‘bank run’) can sink a healthy-looking bank.
4. Real Examples
You deposit paycheck; the bank lends part of it to someone buying a car; that seller deposits the money in their own bank.
A checking account lets you pay by card or transfer instead of carrying cash, with the bank updating the records.
5. How It Affects Us
Banks grease the wheels of the economy by channeling savings into investment and enabling payments.
When banks lend carelessly, it can trigger wider crises — which is why oversight matters.
6. Key Takeaways
- Banks hold deposits, move money, and lend most of it out to earn the interest spread.
- Your balance is a record, not physical cash; oversight protects the system from runs.