Tokyo stocks tumbled Tuesday in a global stock rout with the Nikkei index posting its biggest decline since June 2016 on panic selling after the steepest single-day point drop on Wall Street overnight.The 225-issue Nikkei Stock Average ended down 1,071.84 points, or 4.73 percent, from Monday at 21,610.24. The decline was the largest since the index dropped 1,286.33 points in June 2016 and the closing level was its lowest since Oct. 23.The broader Topix index of all First Section issues on the Tokyo Stock Exchange finished 80.33 points, or 4.40 percent, lower at 1,743.41.Every industry categ…READ FULL ARTICLE