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Here's what happens every two weeks in America.
A paycheck gets deposited. Part goes into a 401(k). The 401(k) buys an index fund. The index fund buys stocks by market cap weight.
The Mag 7 are 30–34% of the S&P 500. So 30–34 cents of every passive dollar goes to seven companies. No analyst made the call. No human evaluated the price. The money just flows.
Active price discovery is dead
for the biggest stocks on Earth.
Over 60% of US equity is passive. NVIDIA alone is 25% of total US options premium. The feedback loop — higher price, higher weight, more buying, higher price — has no natural brake.
Except when it does. In July 2023, the Nasdaq forced a Special Rebalance when the Mag 7 hit 55% of the index. They capped it at 40%. Proof the ceiling exists — but it's set by committees, not markets.
What happens when the machine stops buying?
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Full report — the passive flow math, the options concentration data, and the 3 things that could break the loop:
Read The Autopilot Bid
Free Portfolio X-Ray — see your passive flow exposure and structural risk factors:
Run Your Free Scan
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— Scott Covert,
AI Stock Market Impacts
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