The "fuse" mechanism is a trading system in futures trading. When the volatility range touches the specified number of points, the trading will stop for a period of time, or the trading can continue, but the price range cannot exceed the specified number of points. The purpose of setting up the "fuse" mechanism is to control the transaction risk.

The fuse mechanism was officially implemented from 20 16 1, and the Shanghai and Shenzhen 300 Index rose or fell by more than 5%, and it will be suspended for 15 minutes; When the Shanghai and Shenzhen 300 rose or fell more than 7%, the trading time was suspended until the close.

Shanghai Stock Exchange, Shenzhen Stock Exchange and CICC have suspended the implementation of the index fuse mechanism since 20 16 1.8.