The dollar is falling against other major currencies as the euro and the British pound rally thanks to an agreement in Europe that should make it easier to bail out troubled banks.
The euro is up about 1.8 percent, its biggest jump in months, to $1.2660 on Friday from $1.2429 late Thursday. That's a reversal from most of the previous week, when it had been falling.
The dollar also fell against the British pound, the Swiss franc and the Canadian dollar.
The British pound was up about 1.1 percent to $1.5683 from $1.5499.
The dollar fell to 0.9490 Swiss franc from 0.9664 Swiss franc. It fell to 1.0174 Canadian dollar from 1.0353 Canadian dollar.
The exception was the Japanese yen. The dollar rose to 79.85 yen from 79.45 yen.