NY Fed performed rate checks on dollar/yen, source familiar says

NEW YORK, Jan 23 (Reuters) - The New York Federal Reserve performed rate checks on the dollar/yen currency pair around midday, a source familiar with the matter told Reuters.

Against that backdrop, the U.S. dollar began its decline from around 157.50 at midday to a four-week low of 155.66 JPY=. The greenback was last down 1.6% at 155.85 yen.