Question

What is Purchasing Power Parity (PPP) and Interest Rate Parity (IRP)? Discuss the reasons for deviation of PPP relationship and IRP relationship.

06 Sep 2025
Answer :
Word Count : 1225
Purchasing Power Parity (PPP) and Interest Rate Parity (IRP) are fundamental concepts in international financial management that help explain the relationships between exchange rates, prices, and interest rates across countries. Both theories play a crucial role in guiding corporate decisions regarding foreign investments, hedging strategies, and risk management in the global financial environment. Purchasing Power Parity (PPP) is an economic theory that suggests that in the long run, the exchange rate between two countries’ currencies should equalize the price levels of a similar basket of goods and services in both countries. In other words, under PPP, a unit of currency should have the same purchasing power over identical goods in different countries. There are two forms of PPP: absolute and relative. Absolute PPP states that the price of a basket of goods in one country should equal the price of the same basket in another country when expressed in a common currency. Relative PPP, on the other hand, focuses on the changes in price levels over time, implying that the rate of change in exchange rates between two countries should equal the difference in their inflation rates. For example, if the inflation rate in the United States is higher than in Japan, the US dollar should depreciate relative to the Japanese yen to maintain relative purchasing power. Interest Rate Parity (IRP) is a theory in international finance which asserts that the difference in nominal interest rates between two countries is equal to the expected change in exchange rates between the countries’ currencies. IRP ensures that there are no arbitrage opportunities in the foreign exchange market. There are two forms of IRP: covered interest rate parity (CIRP) and uncovered interest rate parity (UIRP). Covered interest rate parity occurs when forward contracts are used to hedge exchange rate risk, ensuring that the return on a domestic investment is ____ _____ _____ __________ ____ ___ __________ _______ _________ __________.
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