Singapore stocks finished lower on Friday, with the benchmark Straits Times Index (STI) down 9.90 points, or 0.30 percent, to close at 3,262.59. A total of 1.62 billion shares changed hands with turnover of 1. 27 billion Singapore dollars (1.02 billion U.S. dollars). Losers led gainers 205 to 189, while 545 others finished unchanged.