市值型ETF的資金規模極限 - 股票QA
By Carol
at 2023-06-30T15:52
at 2023-06-30T15:52
Table of Contents
1. 標的: 市值型ETF
2. 分類:討論
3. 分析/正文:
本來想要選討論的分類,但是我查了版規
如果文章中有提到任何一支股票的話,標題必須選用標的
所以我選了這個標題,有錯請告知
昨天睡覺前想到一個問題,就是有不少人推薦市值型的ETF(被動ETF)
包含巴菲特,那我們來思考一個極度荒謬的狀況
就是全台灣的投資人(包含外資以及勞退基金)明天睡覺醒來都被洗腦
認為世界上唯有0050能買
於是明天全台灣的人瘋狂賣出0050以外的所有股票
瘋狂的賣出錢櫃、汎德永業、巨路、可寧衛等賺錢的好公司
於是全部0050以外的公司都被賣到股價低於面額
因此導致台灣有一千多間公司下市
-------以上當然是不會發生,要討論的是下面-------
我想知道的是,被動式基金之所以能夠成立
就是市場上必須要有足夠多的主動投資人,足夠多的資金來做平均
才能夠讓被動式基金舒服的賺錢
台股市值前50大公司佔據了66.7%的市值,也就是46兆*0.667 = 30.682兆
那如果全台灣的ETF規模超過40兆
會不會導致這些被動式基金被迫用昂貴的金額購買大公司的股票
這就會造成一個結果,就是剩下的6兆規模的主動投資人
他們拿到的平均報酬會高於市場報酬,這6兆規模的人就長期打敗大盤
而在這樣一個情境下,買入市值型ETF似乎就不是一個好主意
所以想要請教一下高手們,有沒有論文或報告有做過這樣的計算
計算被動式ETF如果超過某個上限,會導致你反而拿不到市場報酬
感謝收看
4. 進退場機制:(討論、心得類免填)
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Tags:
股票
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