The spot rupee, which opened at 43.81 per dollar, firmed up to close at 43. 78 per dollar on sustained inflows.Statements of expenditure secretary allaying fears on interest rates and inflation soothed sentiment in the government securities market today.While there was not much change in the price levels of long-term papers, short and medium term papers moved up by 15-30 paise.The 10-year, 7.38% 2,015 bond closed at an yield of 6.65%.Call rates ruled easy at 4.70%, and reverse repo bids totalled Rs 23,000 crore.