Source: Board of Governors of the Federal Reserve System (US)  

Release: Summary Measures of the Foreign Exchange Value of the Dollar  

Units:  Index Mar 1973=100, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Averages of daily figures. Series is price adjusted. A weighted average of the foreign exchange value of the U.S. dollar against a subset of the broad index currencies that do not circulate widely outside the country of issue.

Countries whose currencies are included in the other important trading partners index are Mexico, China, Taiwan, Korea, Singapore, Hong Kong, Malaysia, Brazil, Thailand, Philippines, Indonesia, India, Israel, Saudi Arabia, Russia, Argentina, Venezuela, Chile and Colombia.

For more information about trade-weighted indexes see the Board of Governors methodology.