The index ended the week at 1,255.45 points, showing a 2.5 per cent increase from the previous week.
Foreign investors turned to be net-sellers on Friday, as sold shares were valued Bt1.14 billion above purchases. Since the beginning of this year, they have maintained the net-buyer position, with the net-buy position at Bt2.955 billion.
Asia Plus Securities said in a research note that Thailand should further witness capital outflows. The Thai baht at 6.17pm stood at 33.06 per US dollar.
The securities house, which earlier this week cut the 2014 economic growth forecast from 4.3 per cent to 3.3 per cent, said prolonged political conflicts would pressure domestic demand and consumption as well as the tourism industry.