1. Since the settlement on April 22, 20 19, the trading margin standard of CSI 500 stock index futures has been adjusted to 12%. II. From April 22, 2009, 2065438, the supervision standard for intraday over-trading of stock index futures was adjusted to 500 lots with one hand, and the number of positions opened in hedging transactions was not subject to this restriction. III. From 2065438+April 22, 2009, the handling fee standard for closing stock index futures is adjusted to 3.45 ‰ of the transaction amount.