Tech Rout Erases Nearly $900bn as AI Spending Fears Mount

Global technology stocks are extending a sharp selloff as disappointing US earnings intensify investor concerns over the returns on massive artificial intelligence spending. Big Tech has shed nearly $900bn in a single session, a scale of one-day value destruction that marks one of the most severe single-day drawdowns for the sector and signals a broad reassessment of the economics underpinning the AI investment boom.

The rout has deepened into a global tech selloff, with the anxiety spreading beyond US markets as investors question whether the enormous capital being committed to AI infrastructure will translate into commensurate earnings. The trigger is the current US earnings season, where results have stoked rather than soothed fears that spending on AI is outpacing the revenue it generates.

The move matters for investors well beyond the technology sector: Big Tech's dominance of major equity indices means the selloff carries direct implications for portfolio valuations and index-level performance worldwide. A sustained repricing of AI-related names could ripple through global equity markets and test the broader risk appetite that has supported stocks.

What to watch next: whether further US earnings releases confirm or ease the spending concerns, whether the selling pressure broadens from tech into other sectors, and whether the drawdown stabilises or accelerates into a deeper global equity correction.