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Understanding Foreign Exchange Market and Exchange Rates

Learn about the foreign exchange market and how exchange rates are determined. Discover the factors that affect exchange rates in the long run and short run. Understand the relationship between interest rates and the value of the dollar.

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Understanding Foreign Exchange Market and Exchange Rates

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  1. Chapter 17 The Foreign Exchange Market

  2. Foreign Exchange I Exchange rate: price of one currency in terms of another Foreign exchange market: the financial market where exchange rates are determined Spot transaction: immediate (two-day) exchange of bank deposits Spot exchange rate Forward transaction: the exchange of bank deposits at some specified future date Forward exchange rate

  3. Foreign Exchange II Appreciation: a currency rises in value relative to another currency Depreciation: a currency falls in value relative to another currency When a country’s currency appreciates, the country’s goods abroad become more expensive and foreign goods in that country become less expensive and vice versa Over-the-counter market mainly banks

  4. Figure 1 Exchange Rates, 1990–2014 Source: Federal Reserve Bank of St. Louis, FRED database: http://research.stlouisfed.org/fred2/.

  5. Exchange Rates in the Long Run Law of one price Theory of Purchasing Power Parity assumptions: All goods are identical in both countries Trade barriers and transportation costs are low Many goods and services are not traded across borders

  6. Factors that Affect Exchange Rates in the Long Run Relative price levels Trade barriers Preferences for domestic versus foreign goods Productivity

  7. Figure 2 Purchasing Power Parity, United States/United Kingdom, 1973–2014 (Index: March 1973 = 100.) Source: Federal Reserve Bank of St. Louis, FRED database: http://research.stlouisfed.org/fred2/.

  8. Summary Table 1 Factors That Affect Exchange Rates in the Long Run

  9. Exchange Rates in the Short Run: A Supply and Demand Analysis An exchange rate is the price of domestic assets in terms of foreign assets Supply curve for domestic assets Assume amount of domestic assets is fixed (supply curve is vertical) Demand curve for domestic assets Most important determinant is the relative expected return of domestic assets At lower current values of the dollar (everything else equal), the quantity demanded of dollar assets is higher

  10. Figure 3 Equilibrium in the Foreign Exchange Market

  11. Explaining Changes in Exchange Rates • Shifts in the demand for domestic assets • Domestic interest rate • Foreign interest rate • Expected future exchange rate

  12. Figure 4 Response to an Increase in the Domestic Interest Rate, iD

  13. Figure 5 Response to an Increase in the Foreign Interest Rate, iF

  14. Figure 6 Response to an Increase in the Expected Future Exchange Rate, Eet+1

  15. Summary Table 2 Factors That Shift the Demand Curve for Domestic Assets and Affect the Exchange Rate

  16. Application: Changes in the Equilibrium Exchange Rate Changes in Interest Rates When domestic real interest rates raise, the domestic currency appreciates. When domestic interest rates rise due to an expected increase in inflation, the domestic currency depreciates. Changes in the Money Supply A higher domestic money supply causes the domestic currency to depreciate.

  17. Application: Changes in the Equilibrium Exchange Rate Exchange Rate Overshooting Monetary Neutrality In the long run, a one-time percentage rise in the money supply is matched by the same one-time percentage rise in the price level The exchange rate falls by more in the short run than in the long run Helps to explain why exchange rates exhibit so much volatility

  18. Application: Effects of Changes in Interest Rates on the Equilibrium Exchange Rate • Changes in Interest Rates • When domestic real interest rates raise, the domestic currency appreciates. • When domestic interest rates rise due to an expected increase in inflation, the domestic currency depreciates. • Changes in the Money Supply • A higher domestic money supply causes the domestic currency to depreciate.

  19. Figure 7 Effect of a Rise in the Domestic Interest Rate as a Result of an Increase in Expected Inflation S Exchange Rate, Et (euros/$) 1 E1 2 E2 D2 D1 Quantity of Dollar Assets Step 1. A rise in the domestic real interest as a result of an increase in expected inflation shifts the demand curve to the left . . . Step 2. leading to a fall in the exchange rate.

  20. Application: Why are Exchange Rates So Volatile? • The volatility of exchange rates is due, in part, to the fact that they are based on unstable expectations regarding an uncertain future.

  21. Application: The Dollar and Interest Rates • The value of the dollar and the measure of real interest rates tend to rise and fall together. • Our model of exchange rate determination helps explain the rise in the dollar in the early 1980s and fall thereafter. • a rise in the U.S. real interest rate raises the relative expected return on dollar assets, which leads to purchases of dollar assets that raise the exchange rate

  22. Figure 8 Value of the Dollar and Interest Rates, 1973–2014 Source: Federal Reserve Bank of St. Louis, FRED database: http://research.stlouisfed.org/fred2/.

  23. FIGURE 8 Effect of a Rise in the Money Supply

  24. Application: The Dollar and Interest Rates While there is a strong correspondence between real interest rates and the exchange rate, the relationship between nominal interest rates and exchange rate movements is not nearly as pronounced

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