Explain monetary policy, the role of the RBA, the cash rate as the policy instrument, the transmission mechanism, the policy stance, and the strengths and weaknesses of monetary policy

What this dot point is asking

SCSA wants you to define monetary policy and the RBA's role, explain the cash rate mechanism and the transmission channels, identify the stance, and evaluate strengths and weaknesses. Expect an AD/AS diagram and an extended response.

Monetary policy and the RBA

The RBA's mandate under the Reserve Bank Act 1959 is the stability of the currency, the maintenance of full employment, and the economic prosperity and welfare of the people of Australia. Since 1993 this has been operationalised as an inflation target of 2 to 3 percent on average over time, alongside full employment. The Monetary Policy Board sets the cash rate, meeting eight times per year.

The cash rate

The cash rate is the interest rate on overnight loans between banks in the market for Exchange Settlement balances. It is the RBA's policy instrument. The RBA uses open market operations to keep the actual cash rate at the target:

• To lower the cash rate, the RBA buys government securities, adding reserves and pushing the rate down.
• To raise the cash rate, the RBA sells securities, draining reserves and pushing the rate up.

The transmission mechanism

A change in the cash rate affects the real economy through four channels:

1. Interest rate channel. The cash rate flows through to mortgage, business and deposit rates. Higher rates raise borrowing costs and mortgage repayments (most Australian mortgages are variable), reducing consumption and investment.
2. Asset price channel. Higher rates lower the present value of assets, reducing housing and share prices and household wealth, which dampens consumption (the wealth effect).
3. Exchange rate channel. Higher rates attract foreign capital, tending to appreciate the AUD, which lowers import prices (reducing inflation) and reduces export competitiveness.
4. Expectations channel. RBA decisions and guidance shape inflation expectations and consumer and business confidence, influencing wage and price setting.

These channels reduce or raise AD, shifting it on the AD/AS diagram and changing real GDP and the price level. The full effect operates with a 12 to 18 month lag.

The policy stance

• Expansionary (loose): cash rate below the neutral rate; stimulates AD. Used in downturns.
• Contractionary (tight): cash rate above the neutral rate; dampens AD. Used to fight inflation.
• Neutral: consistent with inflation at target and the economy at capacity.

The neutral cash rate is estimated at around 3 to 3.5 percent, so a rate of 4.35 percent is contractionary.

Unconventional monetary policy

During COVID-19, with rates near zero, the RBA used unconventional tools: a three-year government bond yield target, a Term Funding Facility providing cheap loans to banks, and quantitative easing (large-scale bond purchases). These were wound back as inflation rose from 2021.

Strengths of monetary policy

• Independence from the political cycle.
• Flexibility: decisions eight times a year and can be reversed quickly.
• Anchors expectations through a clear, credible target.
• Strong effect on interest-sensitive spending such as housing.

Weaknesses of monetary policy

• Time lags of 12 to 18 months; the RBA must forecast.
• Blunt instrument: affects all borrowers, cannot target sectors or households.
• Distributional effects: tightening burdens mortgage holders while benefiting savers.
• Zero lower bound: limited room to cut in deep downturns.
• One instrument for multiple objectives that can conflict.