COLOMBO, March 20 (Reuters) - The Sri Lankan rupee closed slightly higher on Monday on dollar selling by banks late in the day, while increased imports and selling of rupee bonds by foreign investors weakened the outlook for the currency, dealers said.
Rupee forwards were active, with two-week forwards closing at 152.40/60 per dollar, compared with Friday's close of 152.60/80.
"Couple of banks were on the selling side at the latter part of the day; maybe some exporter flows and some of their own inflows," said a currency dealer, asking not to be named.
The spot currency was quoted at 151.75/152.40 per dollar, but was not traded.
The country's central bank raised the spot rupee reference rate by 25 cents to 151.60 on Monday, dealers said. It has been been preventing spot rupee trades below 151.35 per dollar since March 8, dealers said.
Central bank officials were not available for comment.
Foreign investors net sold government securities worth 1.41 billion rupees ($9.28 million) in the week ended March 15, after two weeks of net inflows.
They have net sold 63.3 billion rupees of such instruments so far this year.
The rupee has fallen 1.59 percent so far this year, and dealers say they expect the currency to weaken 6-8 percent in 2017. It lost 3.9 percent against the dollar last year. ($1 = 151.9800 Sri Lankan rupees) (Reporting by Ranga Sirilal and Shihar Aneez; Editing by Biju Dwarakanath)