US Markets: Nasdaq and S&P 500 Slip as Tech Valuations Face Pressure

U.S. equity markets experienced a volatile session on Wednesday, with the tech-heavy Nasdaq and S&P 500 retreating amid growing concerns over high valuations. While semiconductor and AI-related stocks faced a sell-off, the Dow Jones Industrial Average managed to buck the trend, bolstered by falling energy prices and shifts in housing policy.

Tech Stocks Retreat Amid Valuation and Margin Concerns

The Nasdaq Composite fell by 104.58 points, or 0.41%, to close at 25,482.46, primarily dragged down by a pullback in the technology sector. Investors are increasingly wary of the high-flying valuations of AI-linked companies, particularly as the market awaits critical results from chipmaker Micron Technology. Despite a massive surge of over 200% in 2026, Micron saw downward pressure on Wednesday.

The semiconductor space also faced headwinds from Cerebras Systems, which saw its stock tumble after forecasting that full-year profit margins would drop below its first-quarter figures. Additionally, OpenAI’s announcement of its in-house inference chip, "Jalapeno," has intensified the competitive landscape, adding to the volatility in chip-related equities.

Energy Prices Drop and the Rise of the Dow

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

The cooling of energy prices provided a much-needed boost to the S&P 500 passenger airlines index and other travel-related stocks. Furthermore, the homebuilding sector saw a surge in activity; companies like Hovnanian Enterprises, PulteGroup, and Toll Brothers all rose after President Trump canceled bipartisan legislation intended to accelerate affordable housing availability.

Macroeconomic Fears and Federal Reserve Outlook

The broader market downturn this week has been severe, erasing more than $1 trillion in market value from the Nasdaq 100. This retreat is fueled by two primary macroeconomic fears: mounting debt-backed spending by "hyperscalers" in the AI sector and the possibility of a more hawkish Federal Reserve.

According to the CME Group's FedWatch tool, traders are now pricing in a second rate hike by the end of December, a shift 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 likely dictate the trajectory of U.S. monetary policy in the coming months.

Key Takeaways

  • Tech Volatility: High valuations and concerns over AI capital expenditure (CapEx) caused the Nasdaq and S&P 500 to end lower, with Micron and Cerebras Systems facing specific pressure.
  • Sector Divergence: Falling oil prices supported the Dow and airline stocks, while housing stocks rallied following changes in legislative direction.
  • Monetary Policy Shift: Markets are bracing for a potentially more hawkish Federal Reserve, with traders betting on a second interest rate hike by year-end.