股指期货合约最后交易日收市后，交易所以交割结算价为基准，划付持仓双方的盈亏，了结所有未平仓合约。
After the last trading day of a stock index futures contract ended , the exchange shall , based on the final settlement price , transfer the profits and losses of both parties of the positions and terminate all the open contracts of positions .
持仓盈亏