US stocks fall as crude oil tops $100 and Treasury yields surge

NEW YORK — The average cost of a gallon of regular gasoline has surged to nearly $4.28 across the United States, a nearly 34% increase from a year earlier, as the war with Iran continues to clog the global flow of crude. This spike at the pump is mirrored by a cooling housing market, where the average long-term U.S. Mortgage rate hit its highest level in over 14 months, while a second one said sales of previously occupied U.S. Homes fell in August to their slowest pace in more than a year.

These consumer pressures are tied to a surge in energy and bond markets. Brent crude briefly topped $108 per barrel on Thursday, while the 10-year yield jumped to 4.95%. The convergence of energy shocks and rising borrowing costs dragged major indices lower; the S&P 500 fell 0.6% for a fourth straight loss, the Dow Jones Industrial Average dropped 0.6%, and the Nasdaq composite sank 0.7%.

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Geopolitical Blockades and the Bond Market

The current market instability is rooted in the physical disruption of energy arteries. Tanker attacks and diminished traffic through the Strait of Hormuz, alongside Houthi operations in the Red Sea and renewed Houthi strikes on Saudi Arabia, have constrained exports from Saudi Arabia's west coast. According to Parameter, Brent has now climbed over 30% since hitting lows in early August.

This physical scarcity translates into a shift in the bond market. The 10-year Treasury yield rose to 4.95% on Thursday, up from 3.97% before the war with Iran began.

Higher yields create a mechanical drag on equity valuations. When the 10-year Treasury offers a higher guaranteed return, investors can make more money putting their money into bonds, which can in turn make investors less willing to pay high prices for stocks and other investments that are riskier than bonds. While some investors see a 5% yield on the 10-year Treasury as the next potential flashpoint, strategists at Bank of America’s Research Investment Committee suggest 7% may be the more important threshold, pointing to peaks for expensive stocks around that point in the past.

The Fiscal Tug-of-War: Dividends vs. Inflation

A secondary layer of volatility stems from a contradiction in U.S. Fiscal policy. Donald Trump's pledge to issue $5,000 dividend checks to American adults if Republicans retain Congress in the midterm elections has met strong pushback from lawmakers, financial markets, and economic experts. According to The Economic Times, critics across the political spectrum argue that the proposed $1.3 trillion payout would severely exacerbate the nation's ongoing inflation troubles and worsen an annual national deficit already approaching $1.8 trillion.

This proposed stimulus stands in opposition to the Federal Reserve's typical mandate to cool the economy. The mechanism for this cooling is the federal funds rate; increasing this rate makes borrowing more expensive for U.S. Households and businesses, slows the overall economy and undercuts prices for investments.

Metric	August/Current Value	Previous/Comparison Value
Wholesale Inflation (PPI)	5.4% (Annual)	4.8% (July)
10-Year Treasury Yield	4.95%	3.97% (Pre-Iran War)
Brent Crude Oil	$107.63 (Settle)	less than $72 (Early July)
Avg. Gasoline Price	$4.28/gal	~34% lower (Year-over-year)

Pass-Through Costs and Corporate Divergence

The impact of these macro pressures is filtering through the economy via a "pass-through" effect. August’s U.S. Producer Price Index climbed 0.4% month-over-month, with energy costs alone jumping 4.2% during the month. Because the PPI measures costs at the wholesale level, retailers could eventually pass such increases in prices onto shoppers.

The resulting environment has created a sharp divergence in corporate performance:

• Growth and Tech: Taiwan Semiconductor Manufacturing reported August revenue of NT$514.8 billion, equivalent to approximately $16.3 billion. This figure marks 53% annual growth and establishes a new company record. Notwithstanding the impressive results, its U.S.-traded shares dropped roughly 2%. Similarly, both Nvidia and Palantir declined Thursday as escalating oil prices, inflation concerns, and rising bond yields pressured technology stocks.
• Consumer Retail: American Eagle Outfitters shares fell 11.87% in premarket trading after the retailer maintained its annual comparable-sales forecast and warned that gross margins in the current quarter could remain unchanged from a year earlier. Macy’s fell 4.7% even though the retailer reported stronger profit and revenue for the latest quarter than analysts expected; the company warned that “there are macroeconomic and geopolitical factors that could influence” how much its customers feel comfortable spending.
• Defense: AeroVironment emerged as among Thursday’s top performers, climbing approximately 7%. The defense contractor announced record fiscal first-quarter revenue of $480.5 million alongside bookings totaling roughly $683 million.
• Outliers: Apple shares rose between 1% and 2% during Thursday’s trading session following the launch of the "iPhone Duo," a $1,999 foldable device.

Frequently Asked Questions

Why does the PPI rise increase the chance of a rate hike?

A report on Thursday said inflation at the U.S. Wholesale level accelerated to 5.4% last month from 4.8% in July, and retailers could eventually pass such increases in prices onto shoppers. The typical move to rein in high inflation is for the Federal Reserve to raise its main interest rate, the federal funds rate.

How does the war in Iran affect U.S. Mortgage rates?

Treasury yields leaped in the bond market on increased worries about inflation, and the 10-year yield jumped to 4.95%. The rising 10-year Treasury yield is making mortgages more expensive and hurting the housing industry.

The immediate direction of the markets now hinges on consumer inflation data, with a report coming on Friday that will show how much inflation U.S. Consumers are feeling. This data will likely inform the Federal Reserve's definitive interest-rate decision during its meeting next week, where traders see a roughly 73% chance the Fed will raise the federal funds rate.

President Donald Trump said on Wednesday that oil prices likely won’t come down until after the U.S. Midterm elections in November. This expectation persists as markets are also assessing whether resilient economic growth can offset pressure from higher borrowing costs and elevated Treasury yields.