The benchmark weighted-average seven-day bond repurchase rate fell 2.57 basis points to 3.0053 percent from 3.0310 percent at the close on Monday.

Borrowing conditions have remained loose this week, prompting the People's Bank of China (PBOC) to make only minor adjustments through open market operations.

The central bank injected 75 billion yuan ($12.03 billion) through seven- and 28-day reverse repos on Tuesday.

Meanwhile, maturing central bank reverse repos will drain a net 102 billion yuan for the week, down from last week's 262 billion yuan and the lowest level since mid-August.

The 14-day repo rate jumped to 3.7431 percent from 3.1037 percent, while the 28-day rose to 4.4691 from 4.1738 percent.

The shortest one-day repo rate was virtually flat at 2.2892 percent from 2.2659 percent.

According to a central bank survey, a growing number of bankers are expecting monetary policy to ease in the first quarter of 2013.

But in the bond market, interest rate swaps (IRS), which price the market's expectation for the future price of money, show little support for the thesis.

Monetary easing expectations put downward pressure on IRS contracts, but since a low in mid-July, one-year and five-year IRS have steadily risen, and were both up around midday against Monday's close.

Center>Copyright Reuters, 2012