Tech Stocks Slide Fuels Worst Week for Nasdaq Since June While Energy Rallies on Oil Spike

The Nasdaq Composite plunged 2.1% on Friday, October 16, closing at 26,140.03, marking its biggest weekly decline since June. The S&P 500 fell 1.1% to 7,659.44, while the Dow Jones Industrial Average dipped 0.3% to 52,002.41

This broad-based drop capped a rough week in which tech and semiconductor stocks led the slide, dragging major indexes lower amid mounting concerns over AI-related financing risks and elevated inflationary pressures.

Tech and Chip Stocks Weigh Heavily

Friday’s steep decline in the Nasdaq was driven by a widespread pullback in technology names, particularly in semiconductors. Micron was down around 5.6% and Intel fell about 5.8%, as AI infrastructure financing concerns deepened. The technology sector ETF (XLK) lost approximately 3%, while chipmakers and memory names declined by nearly 5% and over 4.5%, respectively, tackling significant drag on broader equity performance.

According to analysis, fears around highly leveraged AI infrastructure businesses contributed to sector underperformance, as bond markets began to demand significantly higher yields to compensate for perceived default risks in that niche.

Energy Surges Amid Crude Oil Rally

In contrast to tech’s weakness, energy stocks surged Friday, with the Energy sector ETF (XLE) adding over 2.5%, buoyed by Brent crude topping $100 a barrel amid supply disruptions and Middle East tensions. Matador Resources led gains among individual energy names with a rally of nearly 6%.

This marked a thematic rotation toward energy and defensive sectors as investors pulled back from growth-sensitive areas and sought refuge in sectors offering more stable cash flows.

Weekly Market Snapshot

For the week ended October 16, the Nasdaq fell about 4.5%, logging its worst week in months. The S&P 500 declined roughly 1.9%, while the Dow managed a modest gain of 0.7%, reflecting the outperformance of value and energy sectors. The Russell 2000 small-cap index also lagged, dropping approximately 3%.

What Comes Next?

Heading into the next trading week, equity markets face mixed signals. Persistent inflation and AI financing risks may continue to pressure growth-oriented sectors. Meanwhile, energy’s outperformance—driven by a surge in oil prices—suggests rotation dynamics may persist. Investors will be watching upcoming economic data and earnings reports closely, especially for any signs of easing inflation or changes in financing conditions.

With volatility on the rise and sector divergence growing, next week’s developments could address whether this broad shift toward energy and away from tech is sustainable or a temporary repricing.