Tokyo stocks fell Wednesday morning, as expectations the yen will firm against the U.S. dollar dented exporters while financial stocks dropped on concerns over their earnings outlook. The 225-issue Nikkei Stock Average fell 309.86 points, or 0.80 percent, from Tuesday to 38,527.60. The broader Topix index was down 32.24 points, or 1.16 percent, at 2,755.24. The dollar edged up to the mid-155 yen range in late morning, after weakening overnight as U.S. long-term interest rates fell to raise prospects of a narrowing of the U.S.-Japanese interest rate gap, dealers said. At noon, the dollar fetche…