Tokyo stocks sank Tuesday morning, with the benchmark Nikkei sliding more than 2 percent, as the yen strengthened against the U.S. dollar on expectations the Federal Reserve will decide on a large interest rate cut this week. The 225-issue Nikkei Stock Average fell 753.22 points, or 2.06 percent, from Friday to 35,828.54. Japanese markets were closed Monday for a national holiday. The broader Topix index was down 46.40 points, or 1.80 percent, at 2,524.74. The dollar briefly weakened to the lower 140 yen range amid a growing market view that Fed policymakers may opt for a half-point interest r…