Singapore stocks finished higher on Tuesday, with the benchmark Straits Times Index (STI) up 9.91 points, or 0.32 percent, to close at 3,146.5. A total of 3.6 billion shares changed hands with turnover of 1. 11 billion Singapore dollars (888 million US dollars). Gainers outnumbered decliners 308 to 164, while 486 others finished unchanged. The STI index lost 1.49 points, or 0.05 percent, to close at 3, 136.59 on Monday.