QQQ有100家公司，SPY有500家公司，从风险上是分散了？但是，因为美国的股市里10大公司股值真是太大了！

来源: hhtt 于 2025-09-06 18:29:03 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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