BEIJING, June 18 -- China's five-year treasury bond futures opened mixed on Thursday, with contract for settlement in September 2015 opening at 96.21 yuan (15.71 U.S. dollars), up 0.07 yuan.

The contract for settlement in June 2015 had no trading at the opening and the December contract stayed flat at 97.91 yuan.

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

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