The All Share Price Index slipped 8.35 points to close at 4,889.87 down 0.71 percent. The Milanka index of more liquid stocks dipped 0.25 percent to close at 4,354.02 and the S&P index of large cap stocks closed at 2,753.45 down 0.27 percent.
The day's turnover was 159 million rupees. Dialog Axiata, the island's largest mobile phone operator contributed 17 million rupees with Commercial Bank and Tokyo Cement chipping in with 16 million rupees each.
Aitken Spence PLC gained 0.30 cents to close at 110.00 rupees up 0.27 percent.
Colombo Dockyard PLC lost 2.80 rupees to close at 187.20 down 1.47 percent.
Commercial Bank of Ceylon lost 0.10 cents to close at 97.50 rupees while DFCC closed flat at 110.00
Dialog Axiata PLC closed flat at 6.00 rupees. HNB slipped 1.70 rupees to close at 132.00 down 1.22 percent.
JKH PLC slipped 0.90 cents to close at 184.00 down 0.40 percent.
Notable gainers were Confifi Hotel Holdings up 18.06 percent to close at 188.90 rupees, SMB Leasing up 11.11 percent to close at 1.00 rupees.