Published: September 1, 2026

 

U.S. stocks opened September under pressure as investors confronted a difficult combination of rising oil prices, higher Treasury yields, renewed geopolitical tensions and growing expectations that the Federal Reserve may keep interest rates higher for longer.

The Dow Jones Industrial Average, S&P 500 and Nasdaq Composite all moved lower, with technology and semiconductor stocks among the biggest decliners. At the same time, energy shares gained as crude prices climbed following renewed U.S.-Iran military activity.

The market’s attention is now shifting toward a critical stretch of economic data, including the August jobs report and next week’s inflation figures, while investors also prepare for earnings from several major technology companies.

Wall Street Starts September in the Red

The first trading session of September has started with investors taking a more defensive approach.

The S&P 500 was down roughly 0.5% around midday, while the Nasdaq Composite declined approximately 0.8% and the Dow fell about 0.4%. Technology was one of the weakest areas of the market, while energy stocks benefited from higher crude prices. (Reuters)

The weakness comes after a volatile August in which investors repeatedly shifted between expectations for lower interest rates and concerns that inflation could remain elevated.

September also carries a difficult historical reputation for equities. According to Reuters, the S&P 500 has averaged a decline of approximately 0.7% during September since 1926. (Reuters)

That historical pattern does not determine what happens this month, but it adds another layer of caution at a time when valuations and macroeconomic risks are already receiving greater attention.

Rising Oil Prices Renew Inflation Concerns

One of the biggest catalysts for today’s market weakness is the renewed increase in oil prices.

Crude prices climbed more than 2% after military activity between the United States and Iran resumed, reviving concerns about potential disruptions to global energy supplies. Brent crude was recently trading around $92 per barrel, while WTI crude also moved sharply higher. (Reuters)

The situation is particularly important because energy prices can feed directly into inflation.

Higher gasoline, transportation and production costs can increase expenses for businesses and consumers. If those increases become persistent, the Federal Reserve could have less flexibility to reduce interest rates.

That creates a difficult environment for stocks. Investors want lower interest rates because they reduce financing costs and can increase the present value assigned to future corporate earnings. But an oil-driven inflation shock could force the Fed to maintain restrictive monetary policy.

Energy companies could benefit from the higher commodity prices, while industries sensitive to borrowing costs and consumer spending could face greater pressure.

Treasury Yields Become a Major Market Risk

The bond market is becoming just as important as the stock market for investors trying to understand today’s selloff.

The 10-year Treasury yield climbed to approximately 4.77%, while the two-year yield moved near 4.37%. Higher yields increase the cost of borrowing throughout the economy and can make bonds more attractive relative to stocks. (AP News)

The effect is especially significant for technology companies.

Many high-growth technology stocks are valued on expectations for earnings and cash flows that may arrive years into the future. When interest rates rise, those future earnings become less valuable in today’s dollars.

That helps explain why semiconductor and technology stocks have been under pressure.

Nvidia ($NVDA), Intel ($INTC) and AMD ($AMD) were among the semiconductor names facing declines as the broader technology sector weakened. (Reuters)

The move does not necessarily signal that investors have abandoned artificial intelligence or technology. Instead, it highlights the growing tension between strong AI-related earnings expectations and increasingly restrictive financial conditions.

Fed Policy Moves Back Into the Spotlight

The Federal Reserve is another major factor driving investor sentiment.

Fed Chair Kevin Warsh recently emphasized that the central bank still has more work to do if inflation remains above its target. His comments increased expectations that policymakers could raise interest rates rather than immediately move toward an easier monetary policy. (Reuters)

The change in expectations has been significant.

Barclays now expects two additional Federal Reserve rate increases this year, including one in September and another in December. (Reuters)

Markets had previously been more focused on the possibility of rate cuts. The possibility of additional hikes represents a meaningful change in the interest-rate outlook.

Investors will therefore be watching upcoming inflation and employment data closely.

July job openings came in slightly below expectations, suggesting some cooling in the labor market. However, August manufacturing activity showed improvement, pointing to continued underlying economic strength. (Reuters)

The next major test will be the August employment report, followed by the latest consumer price index data next week.

AI Stocks Face a New Test

The artificial intelligence trade remains one of the most important themes in the stock market, but investors are becoming more selective.

The issue is not simply whether AI spending will continue. The larger question is whether the revenue and earnings generated by that spending will justify the enormous capital investments being made across the technology industry.

That makes this week’s earnings calendar particularly important.

Dell Technologies ($DELL) is scheduled to report quarterly results after the market closes today. Wall Street is expecting approximately $45 billion in revenue and adjusted earnings of around $4.91 per share, with investor attention focused heavily on demand for AI servers. (INDmoney)

Dell has become an important beneficiary of the AI infrastructure buildout, but expectations are extremely high. Investors will be watching not only revenue growth but also margins, server demand, backlog and management’s outlook for future AI infrastructure spending.

The company’s results could provide another indication of whether AI infrastructure demand is translating into sustainable corporate earnings.

Palo Alto Networks Brings Cybersecurity Into Focus

Palo Alto Networks ($PANW) is another major company reporting today.

The cybersecurity company is scheduled to release its fiscal fourth-quarter and full-year 2026 results after the market closes, followed by an earnings call at 1:30 p.m. Pacific time. (Palo Alto Networks Investors)

Cybersecurity remains closely connected to the AI investment cycle because companies adopting AI are also facing increasingly complex security risks.

Palo Alto Networks’ previous quarter showed 31% year-over-year revenue growth to $3.0 billion, while next-generation security annual recurring revenue increased 60% to $8.1 billion. (Palo Alto Networks)

Today’s report will give investors another opportunity to evaluate whether cybersecurity spending can continue growing at elevated rates despite a more challenging macroeconomic environment.

The results could also influence other cybersecurity stocks as investors assess whether strong demand is being sustained across the industry.

Investors Also Have Broadcom in Their Sights

Beyond today’s earnings reports, investors are already looking ahead to Broadcom ($AVGO).

Broadcom is among the major semiconductor companies scheduled to report this week, making its results another important test for the AI infrastructure trade. Reuters identified the upcoming jobs report and Broadcom’s earnings as two of the key hurdles for the stock market rally. (Reuters)

Broadcom is particularly important because its business provides exposure to AI infrastructure beyond traditional GPU demand.

The company’s results and guidance could help investors determine whether AI capital expenditures remain strong across hyperscalers and other major technology customers.

If AI infrastructure spending remains robust while broader economic conditions weaken, the market could continue rewarding companies with direct exposure to AI-related revenue growth.

What Investors Should Watch Next

The market’s direction over the next several sessions will likely depend on three interconnected questions.

First, where do oil prices go from here?

If geopolitical tensions continue pushing crude prices higher, investors could face renewed inflation concerns and additional pressure on interest-rate expectations.

Second, how strong is the U.S. labor market?

A weaker employment report could increase expectations for easier monetary policy, while unexpectedly strong employment data could reinforce the case for higher rates if inflation remains elevated.

Third, can corporate earnings justify current valuations?

This question is particularly important for technology and AI stocks. Companies such as Nvidia ($NVDA), Microsoft ($MSFT), Dell ($DELL), Broadcom ($AVGO) and Palo Alto Networks ($PANW) are operating in areas where investors continue to expect substantial growth.

Strong earnings could help offset concerns about interest rates. Disappointing guidance, however, could make highly valued growth stocks particularly vulnerable.

The Bottom Line for the Stock Market Today

The September selloff is being driven by a combination of factors rather than one isolated piece of bad news.

Higher oil prices are increasing inflation concerns. Rising Treasury yields are putting pressure on growth-stock valuations. The Federal Reserve is signaling that rate increases remain possible, while renewed U.S.-Iran tensions are adding another layer of uncertainty.

At the same time, the underlying corporate earnings story has not disappeared.

AI infrastructure demand remains strong, cybersecurity spending continues to expand and the U.S. economy is showing signs of resilience. That creates a market caught between two competing forces: strong corporate growth on one side and increasingly restrictive financial conditions on the other.

For investors, the next few sessions could therefore be less about whether the bull market is over and more about determining which companies can continue delivering earnings growth in a higher-rate, higher-energy-cost environment.

The August jobs report, next week’s inflation data and this week’s technology earnings will be critical in answering that question.

Sources

• Reuters: Wall Street kicks off September under pressure as higher yields and oil prices weigh
• Reuters: Oil prices rise as renewed U.S.-Iran fighting stokes supply fears
• Reuters: Warsh signals the Fed may need to hike rates if inflation persists
• Reuters: Barclays sees two more Fed rate hikes this year
• Reuters: Wall Street week ahead, jobs report and Broadcom earnings
• Investopedia: 5 Things to Know Before the Stock Market Opens on September 1, 2026
• Palo Alto Networks: Fiscal Q4 and FY2026 earnings announcement
• Palo Alto Networks: Fiscal Q3 2026 financial results