The Colombo All Share Index closed at 5,653.80 down 84.44 points and the S & P SL 20 Index closed 42.56 points lower at 3055.86 down 1.37 percent.
Turnover was 1,574 million rupees. Top contributors to the day's turnover were Keells Holdings with 785 million rupees, Environmental Resource Investments with 307.2 million rupees and Environmental Resource Investments (warrant-6) with 105.6 million rupees.
Coco Lanka PLC dropped 9.70 rupees to close at 47.70 rupees down 16.90 percent.
Aitken Spence PLC slipped 2.70 rupees to close at 129.00 rupees down 2.05 percent. AVIVA NDB Insurance PLC lost 0.20 cents to close at 370.00 down 0.05 percent.
Commercial Bank slipped 0.70 cents to close at 92.50 rupees down 0.75 percent. DFCC Bank slipped 2.80 rupees to close at 111.20 rupees down 2.46 percent.
Dialog Axiata PLC slipped 0.10 cents to close at 8.40 rupees down 1.18 percent.
Index heavy John Keells Holdings PLC slipped 0.40 cents to close at 205.00 rupees down 0.19 percent.