超额保证金在长期或短期账户中，超过法定保证金维持范围的股票账户净值。
Excess margin Equity in a stock account above the legal limit required for margin maintenance in a long or short account.
限制账户当净值低于最低保证金维持时，客户不续存资金就不能买入股票。
Restricted AccountWhen equity falls below the minimum margin maintenance a customer may not make further purchases without additional deposit.
超额保证金在长期或短期账户中，超过法定保证金维持范围的股票账户净值。
Margin money deposited into a stock account in order to borrow money to purchase or sell short securities.
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