ECON5002 · Macroeconomic Theory
The Financial System and Monetary Policy
This chapter explains how the Australian financial system channels saving into investment and how money and credit are actually created, priced and steered. Its central, exam-critical claim is that money is endogenous: the RBA sets the cash rate (a price) rather than fixing a money quantity, so causation runs loans → deposits → reserves, the reverse of the textbook money-multiplier story. You will learn credit creation and the multiplier 1/rr, the demand for money, how bond prices move inversely to interest rates, and how the slope of the yield curve reveals the market's expectation of future policy. It sits in the closed-book mid-semester test (Topics 1-3) and rewards both clean calculations and an essay framed in the RBA's interest-setting language.
What this chapter covers
- 011. The Australian financial system — RBA at the apex, APRA (prudential) and ASIC (conduct), commercial banks and NBFIs across the payments system
- 022. Central-bank functions — monetary policy, lender of last resort, liquidity management, banker to government, system stability
- 033. Financial intermediation — maturity transformation (borrow short, lend long), risk pooling, expert allocation, and the spread that pays for them
- 044. Endogenous vs exogenous money — the signature claim that the RBA sets the cash rate and accommodates the quantity, not the other way around
- 055. Credit creation & the money multiplier — ΔD = ΔL/(1−rr), the multiplier 1/rr, and why the Quantity Theory breaks down here
- 066. The demand for money — transactions/precautionary balances L₁(YP) plus asset/speculative balances L₂(i)
- 077. Monetary policy operations — setting the cash rate via open-market operations and the cash-rate corridor; transmission to spending
- 088. Bond pricing, present value & the yield curve — P = F/(1+i), the consol P = F/i, the inverse price-yield link, and the expectations hypothesis
Credit creation in a zero-cash banking system
- +1Money multiplier = 1/rr = 1/0.125 = 8, so each dollar of reserves can ultimately support up to $8 of deposits.
- +2Eventual deposits: using the loans-first relation ΔD = ΔL/(1 − rr) = 700 / (1 − 0.125) = 700 / 0.875 = $800m.
- +1Reserves required against those deposits: ΔR = rr·ΔD = 0.125 × 800 = $100m.
- +1Balance-sheet check: deposits should equal new loans plus new reserves, 700 + 100 = 800 ✓.
- +1Causation: the banks lent first and the RBA supplied the $100m of reserves on demand at the cash rate — loans → deposits → reserves. The multiplier describes the accounting result; it does not drive it.
Key terms
- Endogenous money
- The view that the central bank sets the short-term interest rate and the quantity of money adjusts to demand; the money stock is demand-determined rather than a fixed policy lever. The signature framing of this course.
- Official cash rate
- The RBA's policy interest rate, set as a target and defended through open-market operations within a corridor (a standing lending facility above target and an exchange-settlement deposit rate below it).
- Reserve / liquidity ratio (rr)
- The fraction of deposits a bank holds as reserves, rr = R/D. It bounds how far an initial change in lending or reserves can expand total deposits.
- Money (credit-creation) multiplier
- The factor 1/rr by which deposits can expand; combined with the loans-first relation ΔD = ΔL/(1 − rr), it describes the accounting of credit creation.
- Maturity transformation
- A bank's core business of borrowing short (at-call deposits) and lending long (mortgages, business loans); profitable but the source of liquidity risk and bank runs.
- Demand for money
- Mᵈ = L₁(YP) + L₂(i): transactions and precautionary balances that rise with nominal income, plus asset/speculative balances that fall as the interest rate rises.
- Present value / bond price
- The price of a bond is the present discounted value of its future payments, PV = Σ z/(1+i)ⁿ. A one-year discount bond is P = F/(1+i) and a consol is P = F/i; prices move inversely to yields.
- Expectations hypothesis (yield curve)
- A long rate is approximately the average of current and expected future short rates; the slope of the yield curve therefore reveals the market's expectation of future monetary policy.
The Financial System and Monetary Policy FAQ
Why does this course insist money is endogenous?
Because it models a deregulated economy where the RBA implements policy by setting the cash rate, not by fixing a money quantity. Banks lend first and the RBA supplies the reserves the system needs at that rate, so causation runs loans → deposits → reserves and the money stock is demand-determined.
When do I use the money multiplier 1/rr then?
Use it to compute the eventual deposit expansion — ΔD = ΔL/(1 − rr), with multiplier 1/rr — as an accounting description of credit creation. Just don't present the exogenous reserves → loans mechanism as the causal story; that is the recurring lost-marks answer.
Why do bond prices fall when interest rates rise?
A bond's price is the present value of fixed future payments. The interest rate is the discount rate in the denominator (P = F/(1+i) for a discount bond, P = F/i for a consol), so a higher rate lowers the present value and the price. The relationship is always inverse.
What does the slope of the yield curve tell me?
Under the expectations hypothesis a long rate is roughly the average of current and expected future short rates. An upward slope means the market expects short rates to rise (anticipated tightening), an inverted curve means it expects them to fall (anticipated easing), and a flat curve means no change.
How is this chapter examined?
It is part of the 30% closed-book mid-semester test (Topics 1-3): expect a quantitative item — credit creation or a bond price/yield calculation — plus essay material on the RBA's interest-setting framework, endogenous money, or the yield curve. Show the formula before the number and interpret in the RBA's language.
What is the difference between APRA and ASIC?
APRA is the prudential regulator (capital adequacy under Basel III, liquidity and risk standards, safeguarding depositors), while ASIC is the conduct regulator (securities, corporate finance, consumer credit, market integrity and disclosure). Both exist to contain the asymmetric information and moral hazard inherent in finance.
Exam move
Anchor everything in one idea: in this course the RBA sets the price of money (the cash rate) and the quantity is endogenous, so causation runs loans → deposits → reserves. Drill the three quantitative cores against the clock until the setup is automatic — credit creation (ΔD = ΔL/(1 − rr), multiplier 1/rr), bond pricing and yields (P = F/(1+i), consol P = F/i, prices inverse to rates), and the yield-curve expectations approximation (i₂ ≈ ½(i₁ + iᵉ)) — and always write the formula before the number, because the marker rewards the setup. For the essay, build a one-paragraph plan that leads with the interest-setting / endogenous-money framework, names open-market operations as the RBA's tool, and links forward to the horizontal LM curve of Topic 4. The single biggest trap to rehearse out of your answers is the textbook exogenous money-multiplier mechanism — describe it as accounting, never as the cause.
