0 million rupees," Lanka Securities said.
Prices of banking stocks such as NTB, Commercial Bank, Hatton National Bank and DFCC rose sharply.
National Development Bank was the top contributor to the daily turnover with one big crossing or off-market private deal.
The main All Share Price Index closed up 0.53 percent (30.12 points) at 5,755.56, while the more liquid Milanka index rose 1.
11 percent (54.40 points) to close at 4,976.21.
Turnover was 1.4 billion rupees, according to stock exchange provisional figures.
"The equity market endured a volatile trading session today where in the morning session the market continued its rally from Friday. However, the bourse lost steam as the day progressed," Lanka Securities said.
Selling pressure came in as investors realized profits.