Tokyo stocks rebounded Thursday, with the Nikkei index briefly gaining over 2 percent, driven by dip-buying after recent sharp losses.The 225-issue Nikkei Stock Average ended up 671.41 points, or 1.34 percent, from Wednesday at 50,883.68. The broader Topix index finished 45.16 points, or 1.38 percent, higher at 3,313.45.On the top-tier Prime Market, the main gainers were nonferrous metal, machinery and securities house issues.The U.S. dollar was directionless mostly in the upper 153 yen range in Tokyo, amid a lack of fresh trading incentives, dealers said.At 5 p.m., the dollar fetched 153.8…READ FULL ARTICLE