At present, there are many foreign indexes tracking China stock market, among which FTSE A50 index is the most important one, and the change of this index can also provide some reference for domestic investment. FTSE A50 Index is a real-time tradable index launched by FTSE Russell Index Co., Ltd., one of the four largest index companies in the world, to meet the needs of investors in China and qualified foreign institutional investors (QFII). The index is listed on the Singapore Stock Exchange, and its constituent stocks are the 50 companies with the largest market value in China A-share market, which are basically the same as the SSE 50 Index, but different in trading system. On the basis of A50 index, there is FTSE A50 stock index futures. The trading system of this stock index futures is more flexible than that in China, which is mainly reflected in the following aspects: 1 trading time: the trading time of domestic stock index futures is from Monday to Friday at 9:151130, and in the afternoon1. The trading time of the last trading day is 9:151:30, and it is 13:00 15:00 in the afternoon. The trading hours of FTSE Russell A50 futures index are from Monday to Friday at 9:00 16:30, and there is another night trading session at 4:45 the next day at 17:00. 2. Price limit: the price limit of domestic stock index futures is initially set to plus or minus10% of the settlement price of the previous trading day; FTSE Russell A50 refers to the segment price limit. 3 margin level: FTSE Russell's margin level is much smaller, which is more suitable for short-term trading. In addition, the profit and loss leverage is also large, and the risk level is higher than that of domestic stock index futures. 4 Contract variety: FTSE Russell A50 refers to two consecutive months, plus four consecutive quarters of March, June, September and1mid-February, so there are six contracts trading at the same time, two more forward month contracts than the Shanghai and Shenzhen 300 Index. Generally speaking, risks and benefits are directly proportional. Although the trading system of FTSE A50 index should be more flexible, the risk should be greater and investors should participate rationally.