China's treasury bond futures opened mixed on Wednesday, with contract for settlement in June 2014 opening flat at 92.588 yuan (15.18 U.S. dollars). The contracts for settlement in September opened lower at 93.006 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 (CFFEX) and started trading on Sept. 6, 2013.