Tokyo stocks opened higher Tuesday, supported by buying of semiconductor-related issues following the rise of a key U.S. chip index. In the first 15 minutes of trading, the 225-issue Nikkei Stock Average rose 65.97 points, or 0.17 percent, from Monday to 39,299.68. The broader Topix index was up 4.68 points, or 0.18 percent, at 2,678.30. On the top-tier Prime Market, gainers were led by iron and steel, machinery and securities house shares. At 9 a.m., the U.S. dollar fetched 150.53-56 yen compared with 150.65-75 yen in New York and 150.46-47 yen in Tokyo at 5 p.m. Monday. The euro was quoted a…