50 ％原则：

来源: zhoufang 于 2025-10-13 09:39:47 [旧帖] [给我悄悄话] 本文已被阅读：次

周五，SPY跌18美元，现在涨回11达那。是不是超过50%？

琢磨一下

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.