FED SEEN BUYING DOLLARS FOR YEN IN OPEN MARKET The Federal Reserve was detected buying dollars for yen in the open market as the dollar fell to a 40-year low of 144.60 yen in nervous late morning trading, currency dealers said. They said the size of the intervention was relatively modest so far but it was a clear indication that the U.S. remained committed to the late February Paris currency stabilization accord, which was reaffirmed in Washington last night. A Fed spokeswoman had no comment on the dealer reports. The dollar hovered around 144.70 just before midday.