US monetary policy actions

US monetary policy actions influence exchange rates. The dollar's exchange value in terms of other currencies is therefore one of the channels through which U.S. monetary policy affects the U.S. economy. If Federal Reserve actions raised U.S. interest rates, for instance, the foreign ex-change value of the dollar generally would rise. An increase in the foreign exchange value of the dollar, in turn, would raise the price in foreign currency of U.S. goods traded on world markets and lower the dollar price of goods imported into the United States. By restraining exports and boosting imports, these developments could lower output and price levels in the economy. In contrast, an increase in interest rates in a foreign country could raise worldwide demand for assets denominated in that country's currency and thereby reduce the dollar's value in terms of that currency. Other things being equal, U.S. output and price levels would tend to increase must the opposite of what happens when U.S. interest rates rise.

The Fed therefore officially controls exchange rates of the US Dollar through Monetary Policy. The Fed, in response to a weakening US economy and a Subprime crisis, has taken an aggressive policy of cutting interest rates, thus dropping the dollar.