保证金账户 meaning in English

margin account

Buying power amount of money available in a margin account to buy securities based on excess margin divided by the margin requirement
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。
Banking - securities transfer service : it refers to service of mutual transfers between accounts of bank deposits and accounts of securities margins provided to clients through such methods as savings counters , telephone banking service and pos system of the bank
银证转账服务：通过我行储蓄机构柜台、电话银行服务和自助终端等方式，向客户提供银行存款账户与证券保证金账户之间的相互转账。