U.S. Dollar Index

U.S. Dollar Index - What is it?

The U.S. Dollar Index is an measure of the value of the United States dollar relative to a basket of six foreign currencies. The Index goes up when the U.S. dollar is stronger compared to other currencies.

For some relative context, the U.S. Dollar Index started in 1973 at the value of 100.000. It has since traded as high as 164.72 in February 1985, and as low as 70.69 in March 2008.

Which currencies are in the U.S. Dollar Index ?

The U.S. Dollar Index is a weighted geometric mean of the US dollar's value relative to following six currencies:

• Euro (EUR), 57.6% weight
• Japanese yen (JPY) 13.6% weight
• Pound sterling (GBP), 11.9% weight
• Canadian dollar (CAD), 9.1% weight
• Swedish krona (SEK), 4.2% weight
• Swiss franc (CHF) 3.6% weight

The table below compares the USD-X 90 day trend relative to the USD directly against each of the six index currencies: USD-EUR, USD-JPY, USD-GBP etc.

Forecasts for the US dollar change all the time, affected by news events and relative sentiment towards the US economy.

Read our US Dollar Forecasts, Trends and News for a review of forecasts from banks and FX experts as well as news and recent movements of USD in the currency markets.