are you talking about option?

来源: yma16 于 2012-08-31 10:21:36 [] [博客] [旧帖] [给我悄悄话] 阅读数 : 0 (88 bytes)

If you long a stock at $100 and it is down to $80, your account cannot be less 0.

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• 当然了那只是选择什么金融产品的问题 -一个头两个大- ♀ 给 一个头两个大 发送悄悄话 (0 bytes) () 08/31/2012 postreply 10:32:38

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