Monetary Policy under Fixed Exchange Rates Quiz

Under a fixed rate with open capital markets, any attempt by the central bank to change interest rates triggers immediate capital flows. A rate cut causes capital to flow out in search of higher returns abroad, putting downward pressure on the currency. To defend the peg, the central bank must reverse the rate cut by buying back domestic currency, effectively undoing the monetary stimulus. This is the core mechanism behind the Mundell-Fleming framework showing monetary policy impotence under fixed rates.

The answer is True. This is one of the central results of the Mundell-Fleming model. Under a fixed exchange rate with free capital flows, fiscal expansion raises domestic demand and income without triggering the crowding-out of investment through higher interest rates that occurs under floating rates. Capital inflows that accompany the interest rate support needed to maintain the peg amplify the fiscal stimulus, making fiscal policy highly effective under these conditions.

In the Mundell-Fleming framework, an expansionary monetary policy under a fixed rate with free capital mobility is self-defeating. Lower interest rates from money supply expansion trigger capital outflows as investors seek better returns abroad. This puts downward pressure on the currency. The central bank must sell reserves and buy domestic currency to defend the peg, contracting the money supply back to its original level. The net effect on output and the money supply is zero.

Fixed exchange rate systems impose significant monetary policy constraints. The central bank cannot cut rates without risking capital outflows that undermine the peg. It must align rates with the anchor country to prevent destabilizing flows. Its policy tools are directed at exchange rate maintenance rather than domestic objectives. Complete freedom to expand the money supply is incompatible with maintaining a fixed rate under open capital markets.

The answer is False. Under a fixed exchange rate with open capital flows, attempts to permanently lower interest rates by expanding the money supply are reversed by market forces. Capital flows out when domestic rates fall, putting pressure on the currency, and the central bank must contract the money supply to defend the peg. The interest rate returns to the level consistent with the anchor currency, making a permanent monetary stimulus impossible under these conditions.

The greater the freedom for capital to move across borders, the more quickly any interest rate deviation from the anchor country's rate will be arbitraged away through capital flows. Under perfect capital mobility, even a tiny interest rate cut produces immediate outflows that drain reserves and force the central bank to reverse course. This is why high capital mobility is one of the key conditions that strips monetary policy of its effectiveness under a fixed exchange rate regime.

Under fixed exchange rates with free capital mobility, fiscal expansion boosts demand without raising interest rates because any upward pressure on rates attracts capital inflows that keep rates steady at the pegged level. This eliminates the investment crowding-out that would normally reduce fiscal multiplier effects. As a result, fiscal policy has a full demand-stimulating effect, making it the preferred macroeconomic stabilization tool when monetary policy is constrained by the peg.

The answer is True. Capital controls restrict the free movement of money across borders, limiting the capital flows that would otherwise arbitrage away any domestic interest rate deviation from the anchor country. With capital mobility restricted, the central bank can adjust interest rates without triggering the destabilizing flows that would undermine the peg. This allows a degree of monetary independence to coexist with a fixed exchange rate, addressing the impossible trinity by restricting the third element.

The Mundell-Fleming model produces three key results under a fixed rate with free capital mobility. Monetary policy is ineffective because it is self-defeating through capital flows. Fiscal policy is effective because the interest rate is held stable by capital inflows. The central bank loses money supply independence because it must manage reserves to hold the exchange rate. Both policies being equally ineffective is an incorrect description of the model's conclusions.

Under a fixed exchange rate, the pegging country effectively imports the monetary policy of the anchor country. If the anchor country has loose monetary policy that generates inflation, the pegging country faces the same inflationary pressures through import prices and monetary transmission. To maintain the peg, the central bank must match the anchor country's monetary stance, meaning it cannot independently tighten policy to prevent the imported inflation from taking hold.

The answer is True. This is one of the main motivations for pegging to a credible low-inflation currency. By tying the exchange rate to a country with a strong track record of price stability, the pegging country commits to matching the anchor's monetary discipline. Any attempt to create excess money growth would threaten the peg, so the government is forced to maintain tight monetary conditions. This imported credibility can help reduce domestic inflation expectations and achieve price stability.

The impossible trinity, or policy trilemma, states that a country can only achieve two of three goals simultaneously. With a fixed rate and free capital mobility, the exchange rate target and open capital markets together determine the domestic interest rate, leaving no room for independent monetary policy. The central bank's interest rate becomes endogenous, forced to match the anchor country's rate by the arbitrage of free capital movement.

The main arguments against fixing for domestic stabilization purposes are that it prevents counter-cyclical rate cuts, makes it impossible to respond to shocks that affect the domestic economy differently from the anchor country, and imports monetary conditions that may be inappropriate. A fixed rate does not always lead to higher inflation. In fact, pegging to a low-inflation anchor can reduce domestic inflation, making this a cost rather than always a benefit of exchange rate flexibility.

Under classical gold standards and strict fixed rate systems, the price-specie-flow mechanism automatically adjusts the economy. A trade deficit causes gold or reserves to flow out, contracting the domestic money supply. This reduces domestic prices and wages, making exports cheaper and imports more expensive, which gradually corrects the deficit. This internal deflation replaces the exchange rate flexibility that would otherwise provide the adjustment in a floating system.

The answer is True. With the exchange rate fixed, the economy cannot use currency movements to absorb external shocks. Instead, adjustment must occur through internal deflation of wages and prices or through changes in output and employment. This internal adjustment is often more painful and slower than exchange rate adjustment, which is why fixed exchange rate systems can amplify the economic costs of external shocks relative to more flexible arrangements.