The Sri Lankan rupee ended slightly weaker on Thursday on importer dollar demand and as foreign investors sold bonds in the absence of central bank intervention, said dealers. Rupee forwards were active, with the spot-next closing at 147.45/50 per dollar, compared with the previous close of 147.40/50. The spot rupee was quoted at 146.90/95 per dollar, but was hardly traded. It was steady last week after two weeks of losses. The spot rupee is usually managed by the central bank, and market participants use the forward market levels for guidance on the currency.