The 3-month yield fell 01 basis point to 11.35 percent, the 6-month yield fell 06 basis points to 12.85 percent and the 12-month yield fell 01 basis point to 13.15 percent.
The debt office which is a unit of the Central Bank said it sold 30 billion rupees in bills to real bidders after offering 18 billion rupees of bills for roll-over.
Two year bonds maturing on April 01, 2014 were quoted around 13.72/80 percent, bond maturing on July 15, 2012 were quoted at 13.80/90 percent and April -1, 2016 bond were quoted around 14.08/15 percent, dealers said.
A state bank was selling bonds heavily for several days in the market, helping keep rates up dealers said. The state has given Ceylon Petroleum Corporation bonds to settle some debts with state entities.
The rupee also weakened slightly to 130.90/131.05 levels also amid heavy state bank buying dealers said.