The Nikkei stock index soared Wednesday, ending at a nearly 34-year high for a second consecutive day, as the yen's weakness against the U.S. dollar sparked aggressive buying of exporters.The 225-issue Nikkei Stock Average finished up 678.54 points, or 2.01 percent, from Tuesday at 34,441.72, marking its highest close since February 1990 when Japan was experiencing an asset price bubble. It was the largest point gain since Nov. 15.The broader Topix index finished up 31.39 points, or 1.30 percent, at 2,444.48, its highest close since March 1990.On the top-tier Prime Market, gainers were led …READ FULL ARTICLE