The index, rising 1.7 per cent from the previous closing, was boosted largely by foreign capital inflows. Turnover today was Bt58.5 billion.
Foreigners' net-buys in January reached Bt15 billion.
Asian bourses today were mostly up. Tokyo was up 0.47 per cent, or 52.68 points, at 11,191.34 and Sydney climbed 0.87 per cent, or 42.3 points, to 4,921.0 but Seoul eased 0.21 per cent, or 4.15 points, to 1,957.79. Shanghai surged 1.41 per cent, or 33.60 points, to 2,419.02 while Hong Kong was flat, dipping 7.69 points to 22,721.84.