The dollar stayed weaker against the euro after Federal Reserve Chairman Ben S. Bernanke said he won’t rule out further asset purchases.

The dollar was 0.7 percent weaker at $1.2598 at 10:02 a.m. New York time, after weakening as much as 1 percent to $1.2628 earlier. The U.S. currency was 0.1 percent weaker at 78.52 yen.

To contact the reporter on this story: Emma Charlton in London at echarlton1@bloomberg.net

To contact the editor responsible for this story: Paul Dobson at pdobson2@bloomberg.net