Taiwan's share prices closed lower Tuesday with the weighted index down 91.94 points, or 1.1 percent, at 8,262.2, according to news reaching here from Taipei. The local bourse fluctuated between 8,262.2 and 8,372.8 during the day's trading. Turnover totaled 91.19 billion new Taiwan dollars (3.1 billion U.S. dollars).