The yen spiked from around 148 to the 145 level against the dollar in Tokyo trading Monday amid speculation that U.S. labor statistics will be revised down later this week, further blurring the outlook for the world’s biggest economy. At 2 p.m., the dollar fetched 146.21-22 yen compared with 147.54-64 yen in New York and 149.03-05 yen in Tokyo at 5 p.m. Friday. The U.S. Bureau of Labor Statistics will release its data revisions on Wednesday, which are closely watched for clues on when the Federal Reserve might cut interest rates, in turn reducing the interest rate gap between Japan and the Uni…