If Nvidia corrects 20%, the S&P 500 goes into correction territory—not because the economy is broken, but because the gravity of the star driver has warped the entire index around itself.
The star driver of the S&P 500 is no longer a sector, a trend, or a "Magnificent" cohort. It is one company: star sp500 driver
Here lies the dangerous elegance of the situation. As Nvidia’s stock rises, index funds and ETFs are forced to buy more Nvidia to maintain their weightings. Those purchases drive the price higher, which increases Nvidia’s weight in the S&P 500, which forces more buying. It is a self-licking ice cream cone of capital flows. If Nvidia corrects 20%, the S&P 500 goes
How did the market become a one-truck pony? As Nvidia’s stock rises, index funds and ETFs
For now, the star driver is accelerating. But investors would be wise to remember the physics of celestial bodies: the brighter the star, the faster it burns. And when a star driver fades, the black hole it leaves behind swallows everything in its orbit.
This is the paradox of the "Star Driver." When a single stock drives the entire bus, you get incredible velocity. But you also get incredible fragility.
To understand how unusual this is, consider the math. Over the last 18 months, Nvidia has been responsible for roughly . That is not a contribution; that is a dependency. When Nvidia breathes in, the S&P 500 hits an all-time high. When Nvidia stumbles—as it did during a brief supply-chain scare in late 2024—the index bleeds points like a wounded animal.