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As the price falls, the same fund inflows result in less and less buying in $ value, and the price only needs to fall relative to the index for this effect. I expect Mike has the details in his white papers.
Yes, and as I said in the tweet you are replying to, the fund will buy the same percentage of free float of every stock in the index, it won’t buy a smaller percentage of the ones that fell in price. 1/2
Are you claiming that larger $ buying on its own leads to more price impact? If so, why isn’t the price of Apple shares (6.5% weight) constantly being pushed up 6500x more than Under Armour shares (0.01% weight)?
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, passive buying