Unit 4 Test: Financial Sector
Practice AP Macroeconomics Unit 4. Test money market graphs, monetary policy tools, money multiplier, loanable funds, and the Fisher effect with AP-style questions.
The Financial Sector in AP Macroeconomics
Unit 4 covers the mechanics of money, banking, and monetary policy. It introduces two essential AP Macroeconomics graphs — the money market and the loanable funds market — both of which appear regularly in FRQs. Understanding how the Federal Reserve controls the money supply and how interest rates respond to policy actions is critical for earning points on College Board-style exam questions.
Money Supply and Demand
The money market diagram has the nominal interest rate on the vertical axis and the quantity of money on the horizontal axis. The money supply (MS) is drawn as a vertical line, controlled by the Federal Reserve. The money demand (MD) curve slopes downward because lower interest rates reduce the opportunity cost of holding money. Equilibrium determines the nominal interest rate.
Shifting the Money Market
- The Fed increases the money supply by buying bonds (expansionary open market operations), shifting MS right and lowering the nominal interest rate.
- The Fed decreases the money supply by selling bonds (contractionary open market operations), shifting MS left and raising the nominal interest rate.
- Money demand shifts right when nominal GDP rises (more transactions require more money) and left when nominal GDP falls.
Tools of Monetary Policy
- Open Market Operations — The most commonly used tool. Buying government bonds injects reserves into the banking system; selling bonds removes reserves.
- Reserve Requirement — The fraction of deposits banks must hold as reserves. Lowering the requirement increases the money multiplier and expands the money supply.
- Discount Rate — The interest rate the Federal Reserve charges commercial banks for short-term loans. Lowering the discount rate encourages borrowing and expands the money supply.
The Money Multiplier
The money multiplier equals 1 / reserve requirement. If the reserve requirement is 10%, the multiplier is 10, meaning a $1,000 deposit can create up to $10,000 in new money through the banking system. AP questions test both the formula and the reasoning behind it.
The Loanable Funds Market
The loanable funds market shows the real interest rate on the vertical axis and the quantity of loanable funds on the horizontal axis. The supply of loanable funds comes from savers; the demand comes from borrowers (primarily for investment). Equilibrium determines the real interest rate. Government budget deficits increase the demand for loanable funds, raising the real interest rate and potentially crowding out private investment.
Nominal vs Real Interest Rates and the Fisher Effect
The Fisher effect states that the nominal interest rate equals the real interest rate plus the expected inflation rate. AP questions may ask you to calculate the real interest rate given nominal rates and expected inflation, or to explain how inflation expectations affect lending and borrowing decisions.