US Dollar Index (USD) trade-weights The U.S. Dollar Index® is computed using a trade-weighted geometric average of six currencies. The six currencies and their trade weights are: <pre>Euro 57.6 % Japan/yen 13.6 % UK/pound 11.9 % Canada/dollar 9.1 % Sweden/krona 4.2 % Switzerland/franc 3.6 %</pre>