A currency peg is an exchange rate policy in which a national government fixes the value of its currency with respect to a foreign currency or a basket of currencies. Through this policy, a government is able to reduce uncertainty, promote trade, and boost its own economy. When done correctly, currency pegging can be a successful economic strategy.

The most common form of currency peg is a fixed exchange rate regime, accomplished by setting a definite ratio of foreign currency to domestic currency. This ratio ensures that when a citizen of the country trades goods with a citizen of another country, they will be getting a certain, predetermined level of value for their money. As an example, if the country fixed their currency at an exchange rate of 1 USD = 5.00 Domestic Currency, then a citizen of that country would be exchanging goods with a citizen of another country with a value of five times the amount of domestic currency they put in.

However, there are potential downsides to currency pegging. Pegging a currency too low can make domestic living standards low, and can hurt foreign businesses who wish to trade with the country. Additionally, an artificially high peg can contribute to overconsumption of imports, and often causes inflation when it is removed.

Currently there are fourteen countries who have chosen to peg their currencies to the U.S. dollar, which is a useful way of stabilizing their currencies against currency fluctuations due to market volatility. These countries are Bahrain, Belize, Brunei, Djibouti, Hong Kong, Jordan, Kuwait, Lebanon, Qatar, Saudi Arabia, El Salvador, Thailand, Vietnam, and Yemen.

In a nutshell, currency pegging is a useful tool for countries to manage their exchange rate. When done correctly, it can help reduce uncertainty, foster trade, and strengthen the economy. It is important, however, that governments carefully consider potential risks associated with the policy, such as the potential to keep living standards low, or the overconsumption of imports.