China's treasury bond futures opened mixed on Friday, with contract for settlement in March 2014, opened higher at 92.620 yuan (15.17 U.S. dollars). The contracts for settlement in June 2014 opened lower at 93.046 yuan.While the settlement in September 2014 opened lower at 93.156 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. 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.