The Bank of Thailand has taken action on rapid moves in the baht, the governor said on Thursday, as the currency weakened to nine-month lows against the US dollar.
It is the central bank's policy to smooth out any excessive moves in the baht, governor Veerathai Santiprabhob told reporters.
The baht traded at 33.27 against the dollar at 11.48am, having depreciated by 3.6% since the middle of June.
Global trade tensions have yet to have a direct impact on Thailand, but there may be some effect from supply chains, Mr Veerathai said.