The Stock Exchange of Thailand index closed lower, while other Southeast Asian stock markets sharply gained on Wednesday, as strong overnight gains on Wall Street boosted Asian equities across the board.
US stocks surged more than 2% on Tuesday after upbeat earnings reports from major companies and solid economic data, boosting Asian shares on Wednesday. MSCI's broadest index of Asian stocks outside Japan gained 0.5%.
The SET index finished 2.83 points or 0.17% lower to close at 1,695.04, in trade worth 53 billion baht. Airports of Thailand Plc fell 1.2% and telecom service provider Advanced Info Service lost 0.8%.
Philippine stocks closed 1.6% higher, extending gains to a second day, as a sell-off in equities last week turned valuations more attractive, boosting bargain buying.
Lender BDO Unibank Inc rose nearly 3.7% to an over one-week high, while conglomerate Ayala Corp gained 1.6%.
Singapore shares ended 1.2% higher, recouping some of the losses over the last two sessions.
Oversea-Chinese Banking Corp climbed 1.7% and industrial conglomerate Jardine Matheson Holdings Ltd gained 0.9%.
"As valuations remain attractive in Singapore, it's not surprising to find bargain hunting after the recent selloff," said Liu Jinshu, director of research at NRA Capital.
The index was further boosted by upbeat data on non-oil domestic exports growth, which accelerated in September helped by a surge in pharmaceutical shipments.
Malaysian stocks were boosted by hotel operator Genting Malaysia Berhad, which gained over 3%.
Telecom service provider Digi.Com Berhad rose 1.4% and was among top gainers after it posted growth in quarterly earnings.
Indonesian equities climbed 1.2% to a two-week closing high, boosted by gains in telecom and material stocks. PT Telekomunikasi Indonesia Tbk gained 3.2% and mobile phone service provider PT XL Axiata Tbk added 1.4%.
Vietnamese stocks notched gains across all sectors, boosted by real-estate and banking stocks, and closed 0.9% higher.