Exchange Rate Overshooting Mechanism Quiz: Price Stickiness

Exchange rate overshooting is triggered by an unexpected increase in the money supply. The expansion lowers the domestic interest rate below the world rate, making domestic assets less attractive. Capital flows out immediately, causing the currency to depreciate sharply. Because goods prices cannot adjust instantly, the exchange rate must depreciate by more than its long-run equilibrium amount to restore uncovered interest parity by creating an expectation of future appreciation.

The answer is False. In the Dornbusch model, the exchange rate overshoots and investors then expect the currency to appreciate, not depreciate further. The initial overshooting creates an exchange rate level sufficiently below the long-run equilibrium that future appreciation is expected. This expected appreciation compensates investors for accepting the lower domestic interest rate after the monetary expansion, satisfying the uncovered interest parity condition that underlies the model.

After a monetary expansion, the domestic interest rate falls below the world rate. Uncovered interest parity requires that investors be compensated for holding low-yielding domestic assets through an expected future exchange rate appreciation. For appreciation to be expected, the current exchange rate must be below the new long-run equilibrium. Therefore, the exchange rate must initially depreciate beyond the long-run value, creating the undershooting relative to the equilibrium needed to generate the expected future appreciation.

Uncovered interest parity requires that the expected total return on domestic and foreign assets be equal. After overshooting, the domestic interest rate is below the world rate. The exchange rate having depreciated beyond its long-run value means appreciation is expected as the economy adjusts. This expected appreciation exactly offsets the lower domestic interest rate, making rational investors indifferent between domestic and foreign assets. Overshooting is therefore the rational market-clearing outcome, not an anomaly.

The mechanism involves a monetary expansion lowering the domestic interest rate, capital outflows causing sharp depreciation, and the exchange rate moving beyond its long-run value to create the expected future appreciation required by uncovered interest parity. Goods prices rising immediately is the opposite of what the Dornbusch model assumes; sticky goods prices are precisely the reason the exchange rate must overshoot to carry the full burden of short-run adjustment.

The answer is False. Greater goods price flexibility actually reduces the magnitude of overshooting, not increases it. When goods prices adjust more quickly, less of the short-run adjustment burden falls on the exchange rate, so it needs to overshoot by less to restore uncovered interest parity. The maximum overshooting occurs when goods prices are completely rigid, forcing the exchange rate to carry the entire burden of adjustment to restore money market and financial market equilibrium.

After overshooting, the exchange rate begins a gradual appreciation back toward the new long-run equilibrium. This occurs because goods prices slowly rise in response to the monetary expansion and the initial depreciation. As prices increase, the real money supply contracts, interest rates gradually rise back toward the world rate, and the expected appreciation that uncovered interest parity required is delivered as the exchange rate moves from its overshooting value toward its new long-run equilibrium level.

Rational expectations are integral to the overshooting mechanism. Rational investors understand the model's structure, including where the long-run equilibrium exchange rate will be and how goods prices will adjust. They immediately set the exchange rate at the overshooting level that makes the expected path of appreciation consistent with uncovered interest parity. The overshooting is not a mistake but the rational forward-looking response of a market that correctly anticipates the future path of prices and interest rates.

The answer is True. The Dornbusch model is symmetric. Just as a monetary expansion causes the exchange rate to overshoot by depreciating too much, a monetary contraction causes the exchange rate to overshoot by appreciating too much. The reduction in money supply raises the domestic interest rate above the world rate, attracting capital inflows that appreciate the currency beyond its new long-run value. The expected future depreciation compensates investors for the higher domestic rate, satisfying uncovered interest parity.

The size of overshooting depends on goods price stickiness, the magnitude of the monetary shock, and the interest sensitivity of money demand. Stickier prices force more overshooting because prices carry less of the adjustment burden. Larger shocks produce proportionally larger overshooting. Lower interest sensitivity of money demand means a bigger interest rate change is needed to clear the money market, requiring larger overshooting to satisfy uncovered interest parity. Faster capital mobility actually amplifies rather than reduces the initial exchange rate response.

The Dornbusch model directly explains why exchange rate volatility exceeds goods price volatility. Since goods prices are sticky, the exchange rate must do all the short-run adjusting when a monetary shock occurs. This means the exchange rate moves by more in the short run than prices do, producing the volatility differential observed in real data. The model shows this is entirely consistent with rational behavior, providing a theoretical foundation for the high observed volatility of exchange rates relative to price levels.

The answer is False. The Dornbusch overshooting mechanism is not restricted to a fixed money supply rule. The essential condition is that goods prices adjust slowly relative to financial market prices. As long as this sticky price assumption holds, any monetary policy shock that changes interest rates, whether through money supply changes or interest rate targeting, can produce overshooting. The core mechanism depends on the speed differential between goods and financial markets, not on the specific instrument the central bank uses.

Overshooting in the Dornbusch model is a temporary, rational, and self-correcting phenomenon caused by the adjustment speed differential between goods and financial markets. Misalignment, by contrast, refers to a persistent and potentially harmful deviation of the exchange rate from its fundamental equilibrium value, often caused by structural factors such as sustained capital flows, policy distortions, or pricing behavior. Overshooting corrects automatically as prices adjust, while misalignment may require active policy intervention.

The Dornbusch model helps explain the large immediate depreciations following monetary expansions, the gradual convergence toward purchasing power parity as prices adjust over the long run, and the high short-run exchange rate volatility relative to underlying fundamentals. The claim that exchange rates stabilize immediately and permanently at new equilibria is the opposite of what the model predicts; the model explicitly shows that exchange rates overshoot and then converge gradually rather than jumping directly to long-run values.

The speed of convergence back to long-run equilibrium in the Dornbusch model depends directly on how quickly goods prices adjust. When prices adjust faster, the real money supply contracts more quickly, interest rates return to the world rate sooner, and the exchange rate can appreciate back toward its long-run value more rapidly. Slower price adjustment, meaning greater stickiness, means the economy spends more time away from the long-run equilibrium, and the overshooting persists for a longer period.