The U.S. dollar plunged against the yen Monday, briefly falling to the lower 155 yen range from the upper 157 yen level, after Japan and the United States said they conducted coordinated yen buying late last week and warned of further intervention.At 5 p.m., the dollar fetched 156.76-78 yen after briefly hitting 155.20 yen, compared with 157.33-43 yen in New York and 160.20-22 yen in Tokyo at 5 p.m. Friday.The euro was quoted at $1.1526-1527 and 180.69-73 yen against $1.1517-1527 and 181.39-49 yen in New York and $1.1514-1515 and 184.46-50 yen in Tokyo late Friday afternoon.The yield on the…READ FULL ARTICLE