Record 41% top-10 concentration is capping the tape into Q4

Quarter-end rebalancing is the largest seller of equities in this window, and with the top ten S&P 500 names at a record 41% of index weight, Citadel Securities strategist Scott Rubner argues the mechanical flows themselves are what keep capping the tape. In short: the market is not being driven lower by new bearish conviction right now so much as by the plumbing of the trading calendar, and the same plumbing flips to a tailwind on the other side of this week.
Key Takeaways The S&P 500 closed Tuesday at 7,670.84, down 0.17%, about 1.9% below its 7,816.70 record high, with quarter-end rebalancing and elevated long-dated yields suppressing momentum. Citadel Securities' Scott Rubner (Sept 28) ca…
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