[案情简介]原告:××保险公司上海证券业务部被告:何××1994年12月6日,被告在原告处开列了 A049101392期货帐号,1993年1月25日至2月22日,被告先后卖出318品种国债期货150口。2月22日,被告交割单显示要求交保证金45000元,实际交保证金21880元。当日,被告保证金未低于上海证券交易所规定的保证金最低维持线。2月23日,由于国债期货价格波动,被告需追加保证金73520元,而当时被告帐户内只有保证 [Plain] plaintiff: × × Insurance Company Shanghai Securities Defendants: He × × On December 6, 1994, the defendant listed in the plaintiff A049101392 futures account, January 25, 1993 to February 22, the defendant successively Sold 318 varieties of bond futures 150. February 22, the defendant delivery order shows the required deposit 45,000 yuan, the actual payment of 21,880 yuan deposit. On the same day, the defendant’s deposit did not fall below the guaranteed minimum margin maintained by the Shanghai Stock Exchange. On February 23, due to fluctuations in the prices of government bonds and futures, the defendant required an additional deposit of 73,520 yuan, at the time, the defendant’s account was guarantied only