US STOCKS SUFFERED A SHARP SELLOFF AS GROWING FEARS OF AI REGULATION AND SLOWER DATA-CENTER INVESTMENT TRIGGERED A TECHNOLOGY ROUT. THE NASDAQ 100 PLUNGED 6.4%, ERASING $2.3 TRILLION IN MARKET VALUE, WHILE THE S&P 500 FELL 4.4% AND THE CHIPMAKER INDEX SLUMPED 12%.

The headline reports a sharp US equity selloff in which the Nasdaq 100 fell 6.4%, erasing roughly $2.3 trillion in market value, while the S&P 500 also declined as fears of AI regulation and slower data-center investment hit technology names. The transmission mechanism runs through expectations for future earnings: AI-linked firms trade on long-duration growth assumptions tied to sustained capital spending on compute and data-center capacity, so any signal that either regulatory constraints or a slowdown in that spending could curb future cash flows reprices those equities rapidly and pressures the broader index through its heavy weighting in mega-cap technology. The Nasdaq 100 is the most directly exposed benchmark given its concentration in large-cap tech and AI beneficiaries, with the S&P 500 facing secondary spillover, and AI-themed equities and semiconductor and data-center supply-chain names likely absorbing the sharpest drawdowns. Traders should watch upcoming hyperscaler capital expenditure guidance and any formal regulatory proposals on AI, as these will indicate whether the spending slowdown is real and whether the policy over

The Nasdaq-100 (NDX) is the US large-cap tech benchmark. NDX is more sensitive to rate decisions than SPX because of longer-duration cash flows, and heavily concentrated in Tech/Comms names — mega-cap earnings season dominates price action.

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