The index fell sharply due to the surge in Covid-19 cases in Thailand, by 576 on Sunday, the highest single-day spike since the outbreak.
The top 10 stocks with the highest trade value in the morning session were KBANK, STGT, PTT, CPALL, AOT, CPF, BANPU, DELTA, BAM and IVL.
An analyst at Kasikorn Securities expected the SET this week to move between 1,465 and 1,500, advising investors to follow the Monetary Policy Committee meeting, Thai exports in November, the Covid-19 situation, the US-China conflict and Brexit negotiations.
The SET Index closed at 1,482.38 on Friday, down 1.51 points or 0.1 per cent. Total transactions amounted to Bt117.09 billion with an index high of 1,489.78 and a low of 1,475.01.