Carson Cumberbatch closed 18.90 rupees lower at 456.00 rupees and Ceylon Tobacco Company closed 18.00 rupees lower at 1,131.00 rupees, contributing most to the index drop.
Dialog Axiata closed 20 cents lower at 13.80 rupees.
The Colombo benchmark All Share Price Index closed 23.13 points lower at 7,525.10, down 0.31 percent.
The S&P SL20 closed 16.06 points lower at 4,188.81, down 0.38 percent.
Turnover was 1.83 billion rupees, down from 3.83 billion rupees a day earlier with 76 stocks closed positive against 134 negative.
Access Engineering closed 40 cents lower at 41.10 rupees with eight off market transactions of 246.00 million rupees changing hands at 41.00 rupees per share contributing 13 percent of the turnover while attracting most number of trades during the day.
The aggregate value of all off-the-floor deals represented 24 percent of the daily turnover.