Monetary policy is the action of central bank to manage:

Question

BlackTom AI · Accepted Answer

Central banks conduct monetary policy by altering the quantity of money in the economy and by setting or guiding short-term interest rates.

1. Relevant knowledge points and concepts
- Monetary policy: actions by a central bank (e.g., Fed, ECB) to achieve macroeconomic goals (price stability, full employment, growth).
- Tools: open market operations, reserve requirements, discount window, and policy (target) interest rates.
- Transmission mechanism: changes in money supply affect interbank liquidity and market interest rates; interest rates influence investment, consumption, and aggregate demand, which in turn affect inflation and output.

2. Step-by-step reasoning
- Step 1: Central bank uses tools to change monetary base. Example: open market purchases inject reserves into banking system.
- Step 2: Increased reserves raise banks’ ability to create deposits, expanding the money supply (M1/M2).
- Step 3: Greater liquidity lowers short-term market interest rates (e.g., the policy rate or interbank rates) because banks compete to lend excess reserves.
- Step 4: Lower interest rates reduce borrowing costs, stimulate investment and consumption, and affect aggregate demand and inflation over time.

3. Intermediate steps (causal chain example)
- Open market purchase → reserves ↑ → money supply ↑ → short-term interest rate ↓ → investment & consumption ↑ → aggregate demand ↑.

4. Why the correct answer is correct
- Monetary policy directly manipulates money supply and sets/targets interest rates; these are the primary levers available to a central bank. While price level and money demand respond to these actions, they are outcomes or determinants rather than the direct instruments the central bank controls.

5. Why other options are incorrect
- "Money supply and price level": price level is an outcome the bank aims to influence (via inflation targeting), not a direct operational instrument.
- "Money demand and price level": money demand is determined by public preferences (income, interest rates), not directly set by the central bank; price level again is an outcome.
- "Interest rate and Money demand": central banks control interest rates but do not control money demand directly.

Conclusion: The central bank’s monetary policy manages the money supply and interest rates—matching the provided correct answer: Money supply and interest rate.

Monetary policy is the action of central bank to manage:单项选择题

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