The nominal interest rate is the stated rate of interest paid on a loan, unadjusted for inflation (EK MEA-3.B.1). In AP Macro, it equals the expected real interest rate plus expected inflation, and it is the rate determined by money supply and money demand in the money market.
The nominal interest rate is the interest rate you actually see, the number printed on a loan agreement or a savings account. It is "unadjusted for inflation," which is the phrase the CED uses (EK MEA-3.B.1). If a bank charges 7% on a loan, 7% is the nominal rate, full stop.
The catch is that inflation eats into that 7%. Lenders and borrowers know this, so they build expected inflation into the rate they agree on. That gives you the Fisher equation in its AP form, where the nominal interest rate equals the expected real interest rate plus expected inflation (EK MEA-3.B.2). Looking backward, you can find the real rate by subtracting actual inflation from the nominal rate (EK MEA-3.B.3). The nominal rate also does double duty in Unit 4 as the "price" on the vertical axis of the money market graph. When the Fed changes the money supply, the equilibrium nominal interest rate is what moves first.
This term lives in Unit 4 (Financial Sector) and shows up in three topics. Topic 4.2 covers the definition and the calculation (AP Macro 4.2.A, 4.2.B, 4.2.C). Topic 4.5 puts the nominal interest rate on the y-axis of the money market, where equilibrium happens when quantity of money demanded equals quantity supplied (AP Macro 4.5.B) and where shifts in money demand or money supply change the equilibrium nominal rate (AP Macro 4.5.D, 4.5.E). Topic 4.6 makes it the lever of monetary policy, since the central bank's tools work by pushing nominal rates up or down (AP Macro 4.6.A). If you can't draw and shift the money market graph with the nominal interest rate on it, a big chunk of Unit 4 falls apart.
Keep studying AP Macroeconomics Unit 4
Real Interest Rate (Unit 4)
These two are linked by one equation. Nominal rate = expected real rate + expected inflation. The nominal rate is what's written on the loan; the real rate is what the lender actually earns in purchasing power. AP loves making you calculate one from the other.
Demand for Money (Unit 4)
Money demand slopes downward against the nominal interest rate, not the real rate (EK MKT-3.A.1). The logic is that the nominal rate is the opportunity cost of holding cash. Higher nominal rates mean holding money in your wallet costs you more in forgone interest.
Expansionary Monetary Policy (Unit 4)
When the Fed expands the money supply, the money supply curve shifts right and the equilibrium nominal interest rate falls. That lower rate then boosts interest-sensitive spending like investment, which raises aggregate demand. This transmission chain is the most-tested causal sequence in Unit 4.
Inflation (Unit 2)
Inflation is the wedge between nominal and real. Unexpected inflation helps borrowers and hurts lenders precisely because the nominal rate was locked in before prices rose, so the real rate ends up lower than anyone planned.
Multiple-choice questions hit this term two main ways. First, calculations using the Fisher relationship, where you're given two of nominal rate, real rate, and inflation and asked for the third. Second, money market reasoning, like predicting the immediate effect on the nominal interest rate when the Fed increases the money supply, or identifying which open market operation lowers the nominal rate. On FRQs, the nominal interest rate is usually the middle link in a chain. The 2017 SAQ had consumers holding less money because of credit cards, and you had to shift money demand left and show the nominal rate falling on a correctly labeled money market graph. The 2019 SAQ (Canada in a recessionary gap) and 2022 SAQ (central bank selling bonds) both required tracing how a policy action changes the nominal rate and then ripples to investment and aggregate demand. Practice labeling that graph with "nominal interest rate" on the vertical axis, because sloppy axis labels cost points.
The nominal interest rate is the stated rate, unadjusted for inflation. The real interest rate is the nominal rate minus inflation, so it measures the true change in purchasing power. Quick test for which one a question wants: the money market graph uses the nominal rate, while investment decisions and the loanable funds market in the CED run on the real rate. If a problem says a loan charges 8% and inflation is 3%, nominal is 8% and real is 5%.
The nominal interest rate is the stated rate on a loan or savings product, with no adjustment for inflation.
Nominal interest rate = expected real interest rate + expected inflation, and real rate in hindsight = nominal rate minus actual inflation.
The money market graph uses the nominal interest rate on the vertical axis, and equilibrium occurs where money demanded equals money supplied.
An increase in the money supply lowers the equilibrium nominal interest rate, while an increase in money demand (for example, from a higher price level) raises it.
Monetary policy works through the nominal interest rate, so expansionary policy lowers it to boost investment and aggregate demand.
Unexpected inflation lowers the real return on a fixed nominal rate, which benefits borrowers and hurts lenders.
It's the stated interest rate paid on a loan, unadjusted for inflation (EK MEA-3.B.1). It equals the expected real interest rate plus expected inflation, and it's the rate on the y-axis of the money market graph.
Nominal is the sticker rate; real is nominal minus inflation, so it shows the actual gain in purchasing power. If your savings account pays 5% and inflation is 3%, your nominal return is 5% but your real return is only 2%.
No. If inflation is negative (deflation), the real rate is actually higher than the nominal rate. The two are only equal when inflation is exactly zero.
Nominal. Per EK MKT-3.B.1, money market equilibrium happens at the nominal interest rate where money demanded equals money supplied. The loanable funds market is the one that uses the real interest rate, and mixing these up is a classic FRQ point-loser.
Add the expected real interest rate and expected inflation (AP Macro 4.2.C). So if lenders want a 3% real return and expect 4% inflation, they'll charge a 7% nominal rate.