New York stocks closed lower across the three major indexes as a surge in global oil prices amid rising Middle East tensions combined with the burden of artificial intelligence (AI) investment by big tech companies.

A trader works on the floor of the New York Stock Exchange on the 23rd./Courtesy of Yonhap News

On the 23rd (local time) in the New York stock market, the Dow Jones Industrial Average ended at 51,711.65, down 506.93 points, or 0.97%, from the previous session's close.

The Standard & Poor's (S&P) 500 index fell 90.66 points, or 1.21%, to 7,408.30, and the tech-heavy Nasdaq composite ended at 25,137.69, down 553.21 points, or 2.15%.

Brent crude, the global benchmark, topped $100 a barrel for the first time in two months, spurring investors.

September Brent crude futures finished at $100.69 a barrel, up 7.04% from the previous session. September West Texas Intermediate (WTI) futures settled at $92.19 a barrel, up 6.17%.

Brent is at its highest level since May 22, and WTI is at its highest since June 4.

Supply concerns grew as a Saudi tanker was attacked in the Red Sea amid worries about disruptions to traffic in the Strait of Hormuz, a key route for international crude shipments.

Earlier, Yemen's Iran-aligned Houthi rebels declared a blockade of the Red Sea targeting Saudi Arabia, and a day earlier two Saudi tankers were hit by airstrikes. The Houthis said they carried out the attacks.

In response, the United States continued airstrikes on Iran for a 12th straight day. Former President Donald Trump also suggested the possibility of a large-scale strike on Iran.

Rising oil prices stoked inflation fears, lifting U.S. bond yields. The 10-year U.S. Government Bonds yield rose 4 basis points (1 bp = 0.01 percentage point) from the previous session to 4.70%. It is the first time in a year and six months since January last year that the 10-year U.S. Government Bonds yield has topped 4.7%.

The possibility of a Federal Reserve (Fed) benchmark rate hike also reemerged.

Weekly new U.S. jobless claims released that day fell to the lowest level since 1969, reaffirming a solid labor market. As a result, expectations grew that the Fed will continue to prioritize price stability.

Earnings announcements by major tech companies also pushed stocks lower.

Tesla dropped 14.5% after it released that it recorded negative cash flow (cash burn) for the first time in two years.

Alphabet, Google's parent, posted second-quarter results that beat market expectations, but the stock fell 6.8% as free cash flow (FCF) turned negative due to large-scale AI infrastructure investments.

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