US Stocks Fall as Oil Tops $100 and 10-Year Yield Nears 4.90%

U.S. stocks fell shortly after Thursday’s opening bell as hotter than expected producer inflation combined with a renewed surge in oil prices to push Treasury yields higher and revive expectations for another Federal Reserve rate increase. The Dow Jones Industrial Average fell 199.14 points, or 0.38%, to 52,181.50; the S&P 500 dropped 41.46 points, or 0.54%, to 7,594.90; and the Nasdaq Composite slid 239.65 points, or 0.91%, to 26,013.70.

The morning’s pressure began with inflation. The August Producer Price Index rose 5.4% from a year earlier, slightly above expectations, with diesel costs among the major contributors, according to Reuters. The report drove the benchmark 10-year Treasury yield as high as 4.901% and pushed the two-year yield to 4.49%, increasing the market-implied probability of a Fed rate increase next week.

Oil then magnified the problem. WTI crude jumped $4.15, or 4.32%, to $100.20, while Brent surged $4.08, or 4.03%, to $105.29. Reuters reported that i intensified attacks on shipping around the Strait of Hormuz and Red Sea raised fears of deeper supply disruption, sending Brent to roughly $105 and WTI above $100.

That creates an uncomfortable feedback loop for markets because higher oil raises inflation risk, inflation strengthens the argument for tighter monetary policy, and higher expected interest rates lift the discount rate investors apply to future corporate earnings.

The pressure is particularly important for the AI trade. The AI spending boom is forcing hyperscalers to become much larger borrowers just as government debt is also competing for investor capital. More than $200 billion of hyperscaler debt has been issued in 2026, while major technology companies continue committing billions to data centers, chips and power infrastructure.

As Interactive Brokers chief strategist Steve Sosnick told AInvest, companies that historically generated enormous amounts of cash are increasingly “needing money,” leaving governments and corporations competing for the same capital. That makes cash flow and financing costs increasingly important to the AI valuation story.

The bond market offered little relief. Treasury’s decision to triple long-duration bond buybacks to $6 billion failed to prevent yields from reaching new highs, with investors viewing the operation as too small relative to a roughly $32 trillion Treasury market.

Other markets reinforced the risk-off tone. The VIX climbed 1.15 points, or 6.98%, to 17.61, while gold fell $77.20, or 1.73%, to $4,383.50, a move consistent with pressure from sharply higher yields.

Friday’s Consumer Price Index now carries even greater significance. A stronger than expected core CPI reading could materially strengthen the case for a September rate increase. For Wall Street, the question has shifted from whether $100 oil is merely an energy story to whether it becomes the inflation shock that finally pushes Treasury yields through 5% and forces investors to reassess how much they are willing to pay for the AI boom.

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