Financial Sector

Name: AP Macroeconomics Unit 4: Financial Sector
Availability: InStock

18–23% of the exam3 lessons · 41 min

What this unit covers

The topics below follow the published Macro course framework for Unit 4. This unit is worth 18–23% of the exam, so budget your time against that rather than against how long the unit takes to teach.

MoneyBankingMonetary policyMoney market

Lessons in this unit

Money & the Money Market14 min · 3 objectivesIdentify the three functions of money and the measures of the money supply · Explain why money demand slopes downward against the interest rate · Determine the nominal interest rate from money supply and money demand
Banking & the Money Multiplier13 min · 3 objectivesExplain how fractional-reserve banking creates money through lending · Calculate the money multiplier from the reserve requirement · Determine the maximum change in the money supply from a new deposit or reserves
Monetary Policy14 min · 3 objectivesIdentify the central bank’s tools of monetary policy · Distinguish expansionary from contractionary monetary policy · Trace the transmission from a policy tool through interest rates to aggregate demand

Formulas in Unit 4

Real vs. nominal interest rate (Fisher)

Real interest rate ≈ Nominal interest rate − Expected inflation rate

The money market sets the nominal rate; borrowers and lenders care about the real rate. Rearranged: nominal rate = real rate + expected inflation.

Money multiplier & maximum money creation

Money multiplier = 1 / RR · Max Δ money supply = Excess reserves × (1 / RR)

RR is the required reserve ratio as a decimal. From a new deposit, excess reserves = deposit × (1 − RR); the required portion is deposit × RR.

The monetary transmission chain (expansionary)

Buy bonds → MS ↑ → interest rate ↓ → investment ↑ → AD ↑ → real GDP ↑, unemployment ↓

Reverse every arrow for contractionary policy (sell bonds → MS ↓ → interest rate ↑ → investment ↓ → AD ↓).

What examiners penalize here

Draw the money market with a **vertical money supply** and a **downward-sloping money demand**, and label the axes "nominal interest rate" and "quantity of money." A common exam task is to link a money-supply change to the interest rate and then to investment and AD.
On money-creation problems, separate the initial deposit from newly created money, and always start from **excess** reserves. If a question gives the reserve requirement as a percentage, convert to a decimal before taking the reciprocal.
On free-response questions, spell out **every link** in the transmission chain — money supply, interest rate, investment, AD, and real GDP — in the correct direction. Skipping the interest-rate or investment step usually costs a point even if your final answer is right.

Practice Macro

Our practice bank is drawn from across the whole course rather than filtered to one unit, which is closer to how the exam asks anyway — it will not tell you which unit a question is testing.

38 practice questionsEvery one with a written explanation FRQ trainerWritten answers scored against the rubric Macro study guideAll units, weights and score data in one place All 6 Macro unitsThe full course

Questions about this unit

How much of the AP Macroeconomics exam is Unit 4?

Unit 4, Financial Sector, is worth 18–23% of the Macro multiple-choice section according to the published course framework. Across all 6 units that makes it one of the heaviest units on the exam, and worth front-loading.

What topics are covered in Macro Unit 4?

Financial Sector covers Money, Banking, Monetary policy and Money market.

How should I study Macro Unit 4?

Read the 3 lessons below first — about 40 minutes — then work practice questions on these topics. Finish with practice questions and read the explanation for every one you get right by elimination as well as the ones you miss.

All 6 units of AP Macroeconomics

Unit names, topics and exam weights follow the published College Board course framework for AP Macroeconomics. AP® is a trademark registered by the College Board, which does not endorse this site.