BEIJING -- China's treasury bond futures closed mixed on Monday, with the contract for settlement in December, the most actively traded, up 0.024 yuan to 91.342 yuan ($14.89).

The contract for settlement in March 2014 dipped 0.118 yuan to 91.712 yuan, while the contract for June 2014 declined 0.212 yuan to 92.108 yuan.

The contracts are agreements to buy or sell treasury bonds at a predetermined price and set date. They allow investors to bet on and profit from the movements in the value of the bonds.

The treasury bond futures were launched at the Shanghai-based China Financial Futures Exchange (CFFEX) and started trading on September 6, 2013.

The CFFEX set the base value for the December 2013 contract at 94.168 yuan, the March 2014 contract at 94.188 yuan and the June 2014 contract at 94.218 yuan.