你到你的broker balance页面看。有两种balance:一种是margin balance,一种是net balance。根据你说的,你的cash net balance是10k,但是margin balance可以小于 这个数,因为可能一部分你最近的买卖没有settle,也有可能你的账户里有Options,这 部分cash要从net balance减去。
b*y
4 楼
No real difference. In principle, you should prefer margin over cash (not the other way around!) until you exhaust your margin balance, because anything in margin is free to trade more frequently than those settled in cash, and as long as you have enough cash deposit, no margin interest will be charged. So there is really no reason to put shares in the cash account when there is still margin balance available. Even if you use cash account to purchase the stocks, most brokers will automatically transfer them into margin unless you tell them not to do so explictly.