Money creation

Imagine you have a magic cookie jar. Every time you put a cookie in, the jar somehow makes more cookies appear for other people to borrow! That's kind of how money creation works in banks. It's not magic, but it feels a bit like it.

When you deposit money into a bank, the bank doesn't just keep all of it in a vault. Instead, it keeps only a small part of it (this is called the required reserve – think of it as the minimum number of cookies the jar must keep safe). The rest of your money, which is called excess reserves, the bank can lend out to other people or businesses.

When the bank lends out that money, the person who borrowed it usually deposits it into their bank account. And guess what? That new bank then keeps a small part and lends out the rest! This process repeats over and over, making the original amount of money grow into a much larger amount of money in the economy. It's like a ripple effect, where one small splash creates many bigger waves.

Let's say you get a crisp $100 bill from your grandma for your birthday. You decide to be responsible and deposit it into your bank, "Future Fund Bank."

1. You deposit $100: Future Fund Bank now has $100 in new deposits.
2. The bank keeps a little: Let's imagine the government (through the central bank) tells banks they must keep 10% of all deposits. So, Future Fund Bank keeps $10 (10% of $100) in its vault or at the central bank. This is its required reserve.
3. The bank lends out the rest: Future Fund Bank now has $90 (the original $100 minus the $10 reserve) that it can lend out. Let's say your friend, Alex, needs a small loan for a new bike, and Future Fund Bank lends him the $90.
4. Alex deposits the loan: Alex takes his $90 loan and deposits it into his bank, "Smart Saver Bank."
5. Smart Saver Bank repeats the process: Smart Saver Bank now has a new $90 deposit. It keeps 10% ($9) as its required reserve and lends out the remaining $81.

See how your initial $100 deposit has now led to $100 (your deposit) + $90 (Alex's loan) + $81 (the next loan) = $271 in total money circulating in the economy? And it keeps going! Your single $100 created much more money through this lending chain.

1. Initial Deposit: Someone puts cash into a bank account. This increases the bank's reserves (money it holds).
2. Reserve Requirement: The central bank (like the Federal Reserve) sets a reserve requirement, which is the percentage of deposits banks must keep and cannot lend out.
3. Excess Reserves: Any reserves a bank holds above the required amount are called excess reserves. This is the money available for lending.
4. Bank Makes a Loan: The bank uses its excess reserves to give a loan to a customer. This loan is usually deposited into another bank account.
5. New Deposit, New Reserves: The loan becomes a new deposit in another bank, increasing that bank's reserves.
6. Repeat: This new deposit then creates new excess reserves for the second bank, allowing it to make another loan, and the cycle continues.
7. Money Multiplier: Each new loan creates a new deposit, which creates new excess reserves, leading to a multiplied effect on the total money supply (the total amount of money in the economy).

The money multiplier tells us how much the total money supply can expand from an initial deposit. Think of it like a snowball rolling down a hill – it gets bigger and bigger!

It's calculated with a simple formula: 1 / Reserve Requirement.

Let's go back to our example where the reserve requirement was 10% (or 0.10 as a decimal). The money multiplier would be: 1 / 0.10 = 10.

This means that for every $1 of initial deposit, the money supply could potentially increase by $10! So, your $100 initial deposit could lead to a total of $1,000 in the economy ($100 x 10).

Important Note: This is the maximum potential. In reality, people might hold some cash instead of depositing it, or banks might choose to hold more than the required reserves. These actions reduce the actual money creation.

1. ❌ Mistake: Thinking banks create money by printing it. ✅ How to Avoid: Remember, banks create money by making loans from their excess reserves, not by printing physical cash. The central bank (like the Fed) prints cash, but banks create the deposit money we use for most transactions.
2. ❌ Mistake: Confusing reserves with money that's added to the economy. ✅ How to Avoid: Only excess reserves can be loaned out and create new money. Required reserves are just sitting there, fulfilling a rule. Think of required reserves as the minimum amount of cookies the jar must keep, and excess reserves as the cookies it can share.
3. ❌ Mistake: Forgetting that the money multiplier is a maximum. ✅ How to Avoid: Always remember that the money multiplier shows the potential expansion. If people don't deposit all their money, or banks don't lend out all their excess reserves, the actual expansion will be less. It's like saying a car can go 200 mph, but it usually doesn't on city streets.
4. ❌ Mistake: Not understanding the relationship between the reserve requirement and the money multiplier. ✅ How to Avoid: If the reserve requirement goes up, banks have less excess reserves to lend, so the money multiplier goes down (less money created). If the reserve requirement goes down, banks have more excess reserves, and the money multiplier goes up (more money created). They move in opposite directions!