购买力保证金账户中超过利差要求，可以买入证券的那部分超额保证金。
Buying Power Amount of money available in a margin account to buy securities based on excess margin divided by the margin requirement.
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.
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 MarginEquity in a stock account above the legal limit required for margin maintenance in a long or short account.
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