QQQ有100家公司，SPY有500家公司，從風險上是分散了？但是，因為美國的股市裏10大公司股值真是太大了！

來源: hhtt 於 2025-09-06 18:29:03 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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