colombo march 3 reuters  sri lankas central bank raised interest rates in an unexpected move on friday to help finalise an international monetary funds extended fund facility eff arrangement it said in a statement the bank raised its standing deposit facility rate and standing lending facility rate by 100 basis points each to 1550 and 1650 respectively the country is awaiting approval of a 29 billion imf bailout package its economy has been squeezed by its worst financial crisis since independence from britain in 1948 with growth contracting by an estimated 92 last year amid soaring inflation that hit 50 in february reporting by uditha jayasinghe swati bhat and sudipto ganguly editing by robert birsel and john stonestreet