As caution over an artificial intelligence (AI) bubble persisted, the three major U.S. stock indexes ended lower on the 15th.

The New York Stock Exchange on the 19th (local time) /Courtesy of Reuters-Yonhap

On the 15th (U.S. Eastern time) at the New York Stock Exchange (NYSE), the Dow Jones Industrial Average finished at 48,416.56, down 41.49 points, or 0.09%, from the previous session. The Standard & Poor's (S&P) 500 fell 10.90 points, or 0.16%, to 6,816.51, and the Nasdaq composite ended down 137.76 points, or 0.59%, at 23,057.41.

Wariness over AI dampened investor sentiment. Broadcom plunged 5.59% on the day, falling for a third straight session. The three-day decline amounts to 20%. Microsoft, Amazon and Apple also fell about 1%.

The Philadelphia Semiconductor Index, made up of semiconductor-related stocks, also fell 0.61%, marking a third straight day of losses. Among components of the Philly index, Nvidia was slightly higher, while TSMC, AMD and Micron Technology fell in the 1% range.

Funds leaving AI-related stocks flowed into traditional industrials and blue chips, helping other sectors hold up overall. JPMorgan Chase, Johnson & Johnson, Procter & Gamble, Merck, and Goldman Sachs rose about 1%.

David Wagner, head of equities at Aptus Capital Advisors, said, "It seems like everyone hates AI-related investments right now," and noted, "But the 'Magnificent 7' are still undervalued when considering operating leverage, and these core corporations will continue to lead the market."

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