A revaluation is a calculated upward adjustment of a country’s official exchange rate relative to a chosen benchmark, such as wage rates, the price of gold, or a foreign currency.
In a fixed exchange rate regime, only the government of a country, such as its central bank, can change the official value of a currency.
In floating exchange rate systems, currency revaluation can be triggered by various events, including changes in interest rates in different countries or large-scale events affecting the economy.