BEIJING, March 2 (Xinhua) -- China's key Hushen 300 index futures opened lower on Friday, as the contract for settlement in March 2018 opened lower at 4,004.4 points.

The April 2018 contract opened lower at 3,995 points. The June 2018 contract opened lower at 3,988 points. The September 2018 contract opened lower at 4004 points.

The stock-index contracts, agreements to buy or sell the blue-chip Hushen 300 Index at a preset 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 and started trading from April 16, 2010. The CFFEX has set the base value for all the four contracts at 3,399 points.