Reduce the trading margin standard of Shanghai and Shenzhen 300 and SSE 50 stock index futures from 20% to10%; The margin standard of CSI 500 stock index futures trading is lowered from 30% to 15%.

Adjust the supervision standard of intraday excessive trading behavior of stock index futures to a single contract of 50 lots, and the previous limit was that the intraday opening trading volume should not exceed 20 lots; The number of open positions in hedging transactions is not subject to this restriction.