Big Tech's Magnificent Seven stocks have tumbled 6% since October, marking a stark reversal from their dominance over the past two years. The S&P 500 index of tech giants including Nvidia, Amazon, and Microsoft is now trading at its cheapest valuations since April's tariff-driven selloff, with the group's forward earnings multiple falling to 23 times.

This dramatic shift reflects growing investor skepticism about massive AI infrastructure spending. Companies like Amazon and Microsoft are projected to spend $618 billion combined on capital expenditures in 2026, up from $376 billion in 2025. The resulting pressure on free cash flows has investors questioning whether current AI investments will generate sufficient returns, particularly as earnings growth for the group slows to an expected 19% in 2026.

Nvidia's valuation collapse exemplifies the market's changing attitude. The chipmaker now trades at just 21 times forward earnings, matching the broader S&P 500 and down from a 10-year average of 35 times. Meanwhile, Apple stands out as an exception, trading at 29 times earnings above its historical average as it pursues a partnership strategy rather than massive AI infrastructure spending. The rotation away from Big Tech signals a fundamental reassessment of these companies' business models as they transition from asset-light to asset-heavy operations.