Inflation is a money phenomenon — and a tax you don't see.
What you will learn
Explain how central banks create money
Define inflation and its causes
Connect money supply to purchasing power
Money supply and prices
Money supply and prices
How rates shape the economy
How rates shape the economy
How money is created
Central banks create base money; commercial banks multiply it through lending. When you get a loan, the bank credits your account with new deposits — money that didn't exist before. Most money is bank-created credit, not printed cash.
The Fed's three levers
A central bank steers the economy with three tools: the policy interest rate (the price of money), open-market operations (buying/selling bonds to inject or drain reserves), and reserve requirements (how much banks must hold). Modern central banks also use forward guidance and quantitative easing.
What inflation actually is
Inflation is a general rise in prices — a fall in the purchasing power of each unit of money. It's measured by baskets like the CPI. The root cause is nearly always the same: the money supply growing faster than the real supply of goods and services.
💡 The quantity theory
MV = PQ. If the money supply (M) doubles while output (Q) and velocity (V) stay flat, prices (P) must double. Hyperinflations — Weimar Germany, Zimbabwe, Venezuela — are this equation running at full speed with a printing press.
Inflation as a hidden tax
When the government prints, it spends new money first — at old prices — before the inflation ripples outward. Everyone holding cash silently loses purchasing power. That transfer from savers to issuers is the 'inflation tax.'
💡 Your money, shrinking
At 2% inflation, $100 buys $98 of goods next year and about $82 after ten years. At 7% inflation, that same $100 buys only $48 of goods in ten years. This is why cash is a losing long-term position — and why investors seek assets that outrun inflation.
❓ Quick check
The root cause of sustained inflation is usually:
A) Greedy shops
B) Money supply growing faster than goods supply
C) Bad weather
D) Low interest rates alone
Sustained inflation is a monetary phenomenon: too much money chasing too few goods.
(Knowledge check — full exam is next)
Key takeaways
Central banks set the price of money; banks multiply it via lending
Inflation = money supply outpacing goods supply
Inflation is a silent tax on cash holders
📝 Weekly Exam — pass with 80% to unlock next week
10 questions. Review the Deep Dive and courses before attempting.
1. Most money in the economy is created by:
Bank lending creates deposit money — most of the money supply.
2. Which is NOT a central bank tool?
Central banks don't set retail prices.
3. Inflation is best defined as:
Inflation is a broad, sustained rise in the price level.
4. In the quantity equation MV=PQ, if M doubles and Q, V are constant, P must:
Prices double when money doubles and output/velocity are fixed.
5. The 'inflation tax' transfers wealth from:
Savers/cash holders lose purchasing power to the issuer.
6. At 7% annual inflation, $100 is worth about how much after 10 years?
100 × (0.93)^10 ≈ $48 — compounding erosion.
7. Quantitative easing (QE) is:
QE = large-scale asset purchases to add liquidity.