Tokyo stocks plunged Friday morning, with the Nikkei briefly sliding over 2 percent, as exporters were hit by a stronger yen while a sharp drop in U.S. technology shares prompted the market to protect robust earlier gains. The 225-issue Nikkei Stock Average fell 835.10 points, or 1.98 percent, from Thursday to 41,388.92. The broader Topix index was down 28.41 points, or 0.97 percent, at 2,900.76. The U.S. dollar rebounded to the lower 159 yen range in Tokyo after briefly sinking by over 4 yen to hit a three-week low of 157.40 yen in New York after a softer-than-expected June consumer price ind…