The Federal Open Market Committee (FOMC) is responsible for setting the monetary policy of the United States, including the interest rates that impact the value of the US dollar. The FOMC's decisions can have a significant impact on currency exchange rates, as traders and investors react to changes in interest rates and the overall state of the US economy.

When the FOMC raises interest rates, for example, it can make the US dollar more attractive to foreign investors, leading to an increase in demand and a stronger exchange rate. Conversely, if the FOMC lowers interest rates, the US dollar may become less attractive, leading to a decrease in demand and a weaker exchange rate.

Overall, the FOMC's decisions and statements can have a major impact on the currency market, and traders and investors closely watch their actions and announcements to make informed trading decisions.