Singapore stocks finished lower on Friday, with the benchmark Straits Times Index (STI) down 43.18 points, or 1.36 percent, to close at 3,131.47. A total of 3.3 billion shares changed hands with turnover of 905 million Singapore dollars (718 million U.S. dollars). Decliners outnumbered gainers 298 to 141, while 507 others finished unchanged.