OREANDA-NEWS. March 11, 2015. Thai shares posted their biggest single-day loss in almost three months on Tuesday as a bout of late selling in energy stocks weighed, while banks snapped a three-day rising streak ahead of the central bank's decision on interest rates.

Other markets in Southeast Asia were range-bound amid weak sentiment in Asia on concerns the US Federal Reserve would increase interest rates by mid-year.

The key SET index fell 1.8 percent, the biggest single-day fall since Dec. 15.

Shares of PTT Exploration and Production, the no. 2 energy firm by market value, shed 4.9 percent while third-ranked PTT Global Chemical slipped 2.2 percent.

The banking subindex declined 2.7 percent after a third straight gain on Monday to the highest in more than one week. Investors lowered risks on a possible cut in policy rates by the Bank of Thailand, dealers said.

Prime Minister General Prayuth Chan-ocha said on Tuesday Thailand should not rush to cut interest rates, backing market expectations that the central bank would leave policy unchanged at Wednesday's meeting.