Tokyo stocks opened lower Thursday, as investor sentiment was dampened by heavy selling on Wall Street overnight that put an end to a nine-day winning streak on the Dow Jones index. In the first 15 minutes of trading, the 225-issue Nikkei Stock Average fell 434.55 points, or 1.29 percent, from Wednesday to 33,241.39. The broader Topix index was down 24.56 points, or 1.05 percent, at 2,324.82. On the top-tier Prime Market, decliners were led by transportation equipment, precision instrument and wholesale trade issues. At 9 a.m., the U.S. dollar fetched 143.52-53 yen compared with 143.53-63 yen …