US Markets Volatility: Nasdaq and S&P 500 Slip as Tech Stocks Retreat

Wall Street experienced a mixed session on Wednesday as high-flying technology valuations came under intense scrutiny, dragging major indices lower. While the Nasdaq and S&P 500 faced headwinds from the semiconductor sector, the Dow Jones Industrial Average managed to post gains, buoyed by falling energy prices and specific sector rallies.

Tech Sector Under Pressure Amid Valuation Concerns

The Nasdaq Composite saw a notable decline, shedding 104.58 points or 0.41% to close at 25,482.46. The downturn was largely driven by a retreat in tech stocks as investors grew wary of stretched valuations and the massive capital expenditure (CapEx) required for AI infrastructure.

Chipmaker Micron Technology, which has seen a staggering surge of over 200% in 2026, saw its stock fall on Wednesday ahead of its highly anticipated earnings report. Similarly, Cerebras Systems tumbled following its debut report, where the chip designer warned that full-year profit margins would drop below first-quarter levels. Adding to the sector-wide pressure, OpenAI’s announcement of its in-house inference chip, 'Jalapeno,' further intensified the competitive landscape in the semiconductor space.

Energy Prices Fall and the Dow’s Resilience

In contrast to the tech slump, the Dow Jones Industrial Average rose by 187.97 points, or 0.36%, to end at 51,854.81. A significant driver for this divergence was the drop in crude oil prices, which hit their lowest levels since the start of the Iran war. This decline follows expectations of increased tanker movement out of the Strait of Hormuz and reports that Iran is not seeking tolls.

Lower energy costs provided a tailwind for the S&P 500 passenger airlines index. Additionally, the homebuilding sector experienced a surge after President Donald Trump canceled a planned signing of bipartisan legislation intended to accelerate affordable housing availability. Leading companies such as Hovnanian Enterprises, PulteGroup, and Toll Brothers all saw their stock prices rise.

Macroeconomic Fears and Federal Reserve Outlook

The broader market sentiment remains clouded by mounting fears regarding a more hawkish Federal Reserve. Recent volatility has been severe, with the Nasdaq 100 losing more than $1 trillion in market value this week alone. Investors are increasingly concerned about debt-backed spending by hyperscalers and the potential for further interest rate hikes.

According to the CME Group's FedWatch tool, traders are now betting on a second rate hike by the end of December, moving away from the previous expectation of a single 25-basis-point increase. All eyes are now on Thursday’s release of the Personal Consumption Expenditures (PCE) Price Index—the Fed's preferred inflation gauge—which will provide critical clues regarding the future path of monetary policy.

Key Takeaways

  • Tech-Led Decline: High valuations and disappointing guidance from chip designers like Cerebras Systems dragged the Nasdaq and S&P 500 lower.
  • Sector Divergence: While tech struggled, the Dow rose due to falling oil prices benefiting airlines and a boost to homebuilders following policy shifts.
  • Monetary Policy Uncertainty: Markets are pricing in a higher probability of a second Fed rate hike by year-end, pending upcoming inflation data.