Thai stock prices fell 0.87 percent Thursday on profit-taking after gains in the past two days, an analyst said. The Stock Exchange of Thailand (SET) composite index lost 5.12 points to close at 582.74, while the blue-chip SET-50 index dropped 4.01 points to 417.57. Decliners outnumbered advancers 213 to 97 and 128 stocks were unchanged on turnover of 4.0 billion shares worth 20.5 billion baht (601.9 million dollars). The Thai baht slightly rose against the dollar to close at 34.06-08 compared with Wednesday's 34.07-09. But the unit weakened against the euro to close at 47.95-48.00 compared with 47.90-95 the previous day. The market rose in early trading in response to overnight gains on the Dow Jones and Nasdaq, said Capital Nomura Securities analyst Thanomsak Saharatchai. These rises were largely due to tech giant Intel reporting higher than expected earnings per share. 'After a few days of gains, investors took short-term profit,' Thanomsak added. Among blue-chips, coal producer Banpu lost 4.00 baht to 312.00, PTT Plc dropped 2.00 baht to 221.00 while its subsidiary PTT Exploration and Production fell 1.00 baht to 126.00 baht. Bangkok Bank slipped 0.50 baht to finish at 103.50, Kasikornbank was down 1.00 baht to 65.25 and Siam Commercial Bank edged down 0.75 baht to 71.00 baht. Siam Cement closed 2.50 baht lower at 161.00, while the country's largest mobile phone operator Advanced Info Service fell 2.00 baht to 91.00 baht. 