The benchmark Colombo All Share Index closed 05.10 points lower at 6,079.14 and the S&P SL 20 Index closed 12.02 points lower at 3,448.11 down 0.35 percent.
Turnover was 291million rupees.
In the in forex markets the spot US dollar was quoted at 131.55/65 rupees but trading was taking place on spot-next, where settlement is made four days later, dealers said.
The rupee has fallen around four rupees in recent weeks under pressure from excess rupee liquidity and a policy of the monetary authority not to intervene (unsterilized interventions) under a so-called 'flexible exchange rate' stance.
While in the equities market, foreigners brought 118 million rupees worth shares while selling 11 million rupees of shares, in a day that 67 stocks advanced and 125 stocks declined.
Dialog Axita contributed most to the index closing at 8.80 rupees up 0.20 rupees. DFCC closed at 130.00 rupees up 2.00 rupees and and Hatton National Bank closed at 157.30 rupees up 4.10 rupees.
Negative contributors were John Keells Holdings closing at 267.70 rupees down 0.60 rupees. Sri Lanka Telecom closed 41.00 rupees down 0.60 rupees.
In the banking sector, Sampath Bank closed at 200.30 up 0.20 rupees, Pan Asia closed at 18.10 down 0.40 rupees.
Distilleries Company closed flat at 190.00 rupees.