Tokyo stocks were lower Friday morning after overnight declines on Wall Street, but losses were limited as investors scooped up shares that had been battered the previous day. The 225-issue Nikkei Stock Average fell 173.73 points, or 0.43 percent, from Thursday to 39,952.62. The broader Topix index was down 18.16 points, or 0.63 percent, at 2,850.47. The U.S. dollar rose to the mid-157 yen range as the currency was bought after it fell sharply to a one-month low, reaching the lower 155 yen level the previous day, dealers said. At noon, the dollar fetched 157.42-43 yen compared with 157.31-41 y…