China\'s stock index futures opened mixed on Monday, with the contract for settlement in June, the most actively traded, down 10.0 points from the previous close to 2,578.0. The contract for settlement in July surged 2.0 points to open at 2,583.0. The September contract lost 8.2 points to 2,584.8, while the December contract opened flat at 2617.2. The stock-index contracts, agreements to buy or sell the Hushen 300 Index at a present value on an agreed date, are designed to allow investors to bet on and profit from either gains or declines in the market. The index futures were launched at the China Financial Futures Exchange (CFFEX) and started trading from April 16, 2010. The CFFEX has set the base value for all the four contracts at 3,399 points.