The dollar slipped slightly against the euro Wednesday but rose against the yen. The euro bought $1.2880 in late New York trading, up from $1.2868 late Tuesday. The pound was also slightly higher at $1.8811 from $1.8808.
However, the dollar rose against the Japanese yen to 108.61 yen from the 108.14 it bought late Tuesday, regaining ground lost after Japan's central bank announced that its decision to keep its high-liquidity monetary policy unchanged wasn't unanimous.
Meanwhile, the dollar bought 1.2041 Swiss francs, down from 1.2050, and 1.2205 Canadian dollars, up from 1.2195.
On Tuesday, the euro fell as low as $1.2799 in New York trading, its lowest point since Feb. 10, before Greenspan said in a speech to the National Petrochemical and Refiners Association meeting in Texas that high oil and natural gas prices have put energy markets under a degree of strain that hasn't been seen in a generation.
The market is expecting the U.S. Federal Reserve to keep raising interest rates this year, helping nudge the dollar higher, despite nagging worries about the U.S. trade and budget deficits that have weighed on the dollar.