The dollar dropped broadly on Tuesday, as lower U.S. Treasury debt yields drove investors to trim bullish bets, giving a boost to the euro that has so far proven resilient despite talk of looser monetary policy from the region's central bank.
The greenback lost value against the euro, yen, Swiss franc and British pound on month-end portfolio rebalancing flows and as investors trimmed long positions, bets made on expectations the dollar will rise.
The dollar index, which is dominated in composition was last down 0.3 percent at 80.718.
Trade was thin ahead of Thursday's U.S. Thanksgiving Day. The dollar extended losses after data showed consumer confidence unexpectedly slipped in November, with the Conference Board consumer confidence index at its lowest since April.