Question

Discuss the major Theories of exchange rate determination, highlighting their underlying assumptions and real-world relevance. Differentiate between Nominal Exchange Rate and Effective Exchange Rate with suitable examples.

03 Aug 2025
Answer :
Word Count : 1135
Exchange rate determination is a key area of study in currency and debt markets, helping to explain how and why currency values fluctuate. The exchange rate is influenced by a multitude of factors ranging from macroeconomic indicators to market psychology. Several theories have been proposed to explain the mechanisms of exchange rate determination. These theories not only provide insights into the working of currency markets but also help policymakers, investors, and traders make informed decisions. 1. Purchasing Power Parity (PPP) Theory The PPP theory is based on the “Law of One Price,” which asserts that in the absence of transportation and other transaction costs, identical goods should sell for the same price in different countries when prices are expressed in a common currency. According to PPP, exchange rates adjust so that identical goods cost the same in different countries. Assumptions: * No transportation costs or trade barriers. * Homogeneous goods. * Free capital and labor mobility. Types: * Absolute PPP: $S = \frac{P^*}{P}$ where $S$ is the exchange rate, $P^*$ is the foreign price level, and $P$ is the domestic price level. * Relative PPP: Focuses on inflation differentials; if a country's inflation is higher, its currency should depreciate. Real-World Relevance: While PPP holds in the long run, it often fails in the short run due to market imperfections, differences in product quality, taxes, and tariffs. For ____ _______ ___ _____ _____ __________ ____.
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