The spot rupee slipped to 43.73 per dollar as against the last close of 43.69 per dollar on sustained buying by PSU banks today.Government securities prices remained rangebound waiting for triggers from the budget. There was a movement of 3-4 paise across all maturities today.The 10-year, 7.38% 2,015 bond closed at an yield of 6.50%.Call rates were steady at 4.65-4.75%, and reverse repo bids were over Rs 26,000 crore.