[請益] 指數的概念
各位好，小弟第一次來本版發文，如有誤觸板規請指正
最近在唸金融市場，唸到ETF的時候常常看到比如
以"擊敗指數"為目的 或者 追蹤其指數
小弟不禁懷疑，到底"指數"在股市中是指什麼意思?
還有平常大家講的大盤指數又是指什麼意思
指數對我來說好像是要指著一個數，但我搞不懂是指什麼數?
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