Parity conditions in international finance are fundamental concepts that establish theoretical relationships between exchange rates, price levels, and interest rates across countries. These conditions provide a framework to analyze how currencies should adjust to ensure equilibrium in international markets, assuming no arbitrage opportunities exist. They form the basis of much of international financial theory, helping investors, policymakers, and multinational corporations make informed decisions regarding exchange rate movements, investment strategies, and hedging. One of the key parity conditions is Purchasing Power Parity (PPP). PPP is based on the "law of one price," which states that identical goods should sell for the same price in different countries when expressed in a common currency, assuming no transportation costs or trade barriers. There are two main forms of PPP: absolute PPP and relative PPP. Absolute PPP suggests that the spot exchange rate between two currencies equals the ratio of price levels in the two countries. For example, if a basket of goods costs $100 in the United States and the same basket costs €80 in the Eurozone, the absolute PPP exchange rate would be $1.25/€. Relative PPP, on the other hand, focuses on changes over time. It asserts that the rate of change in the exchange rate between two currencies over a period is equal to the difference in their inflation rates. If the U.S. experiences 3% inflation while the Eurozone experiences 1% inflation, the U.S. dollar is expected to depreciate by approximately 2% relative to the euro, according to relative PPP. The applications of PPP are widespread in international