Chip Stocks Suffer $1 Trillion Rout Before AI Earnings Spark Rebound

Global chip stocks experienced a seismic shift this week, shedding over $1 trillion in market value as the initial euphoria surrounding the artificial intelligence boom met the harsh reality of ballooning capital expenditures. The selloff was punctuated by Nvidia, which saw nearly $238 billion wiped from its valuation in a single session. Despite the Philadelphia Semiconductor Index rising 92% over the past year, the recent 20% pullback reflects growing investor anxiety that the massive investments in AI infrastructure may take longer to yield significant returns than previously anticipated.

The downturn has realigned the corporate hierarchy, with Apple reclaiming its title as the world's most valuable company, surpassing Nvidia for the first time since April 2025. While Nvidia’s sales continue to grow, investors have begun shifting focus toward the broader data center ecosystem, including memory chip providers and infrastructure specialists. The market's jitters were further exacerbated by SK Hynix, whose shares tumbled despite reporting record revenue growth of 257%, as the results failed to satisfy the market's sky-high expectations for AI-related performance.

However, the sector saw a sharp relief rally on Thursday, sparked by robust earnings from Microsoft and Lam Research. Lam Research shares posted their best day since 1999, jumping 18% on strong guidance for AI-driven equipment demand. The rebound spread across the industry, with AMD and Applied Materials surging double digits. The volatility underscores a market in transition, where investors are no longer rewarding AI potential alone but are instead scrutinizing the tangible costs and the sustainability of the current buildout.