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by l23k4
12 days ago
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>What? Absolutely not. They are doing what the President is telling them to do. This is a paranoid delusion. These rules were never on particularly solid ground, it's only natural to see them gone when you have significant upcoming IPOs changing the structure of the market. It is the job of these indices to keep up with that. |
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Those rules were implemented to protect the index from being skewed when an IPO happens because the IPO is exactly the moment where the stock may be overvalued and very volatile (compared to all the other stocks that are in the index). We especially don't know at IPO time if the company is changing the structure of the market because it's too soon. And in fact, we won't know for a couple more weeks or even years; but by that time the price will have stabilized.
The index is supposed to be slow at rebalancing to minimize costs and make it practical for providers as well.
And as I write this comment, I've just read that they cancelled the changes[1]. Which completely proves your last sentence wrong.
[1]: https://press.spglobal.com/2026-06-04-S-P-Dow-Jones-Indices-...