During the session, the index moved in the range of 1,579.91 points to 1,592.76 points. Turnover was Bt21.8 billion.
Tisco Securities said in a research note that the market this week would depend largely on the special meeting of the Monetary Policy Committee on Tuesday. Other factors to watch are the European Central Bank's meeting and the legal dispute involving the Bt350 billion water-management ischeme.