Taiwan's share prices closed lower Monday with the weighted index down 34.04 points, or 0.4 percent, to close at 8,354.14, according to news reaching here from Taipei. The local bourse fluctuated between 8,333.63 and 8,371.83 during the day's trading. Turnover totaled 82.5 billion new Taiwan dollars (2.8 billion U.S. dollars).