某一天很難說，但理論上，例如spy beta 1，如果隻有10%spy倉位，怎麽波動理論上也會比全倉spy波動更小。

來源: 求索2014 於 2025-07-24 19:04:23 [舊帖] [給我悄悄話] 本文已被閱讀：次

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