+1，QQQ说是指数，实际上是高科技行业系统股，覆盖的行业单一，风险大，和标普500不能比。

来源: hhtt 于 2023-11-16 05:49:42 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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