[U.S. Market Recap] Sept 15: Dow Falls 328 Points to 52,093 as 10-Year Yield Nears Its Highest Since 2007, AI Slowdown and Fed Worries Weigh

Hey everyone, Hirokichi here. U.S. stocks fell across the board on Tuesday, September 15. The Dow dropped 328 points to close at 52,093, the S&P 500 fell 0.45%, and the Nasdaq Composite lost 0.78%. The declines were all under 1%, but it was still a second straight down day after Monday. Three things weighed on the market: (1) anxiety ahead of the Fed’s rate decision due Wednesday, September 16, (2) a jump in oil prices tied to Middle East tensions, and (3) the lingering fallout from Monday’s AI “slowdown” story. At the same time, individual stocks told a very different story, with one name jumping on merger optimism. Let’s go through the numbers.

The three indexes: the 10-year yield nears its highest level since 2007

All three indexes fell less than 1%, but the Nasdaq’s decline was a bit larger, reflecting continued weakness in AI-related names. The biggest weight on the market was the 10-year Treasury yield, which briefly touched 5.02% and moved closer to its highest level since 2007. With a 25-basis-point rate hike from the Fed almost fully priced in for Wednesday’s decision, the market’s focus has shifted to whether new Fed Chair Kevin Warsh frames it, in his press conference, as a “one-off recalibration” or signals that persistent inflation calls for further tightening, according to Daniela Hathorn, senior market analyst at Capital.com.

With both oil prices and long-term rates rising at the same time, stocks are facing the headwind of a higher discount rate. That caution showed up in the VIX (the “fear index,” which measures expected stock market volatility), which ticked up to 17.20, up 0.58% from the prior day.

What moved the market: an oil spike and the fallout from the AI “slowdown” debate

Oil prices jumped, with WTI crude rising 2.64% to $104.10 a barrel and Brent crude up 2.14% to $107.90 a barrel (source: TheStreet). The move followed an attack on Saudi Arabia’s east-west pipeline and a fresh strike on Saudi Arabia by Iran-aligned Houthi forces, reviving concerns about supply disruptions around the Strait of Hormuz.

The other major story was the AI “slowdown” debate. On September 12, Anthropic CEO Dario Amodei published a roughly 3,800-word essay arguing the industry needs to deliberately “pace the frontier” of AI development. OpenAI’s Sam Altman signaled agreement, and Elon Musk offered a brief endorsement, saying “Dario is right.” That triggered a sharp selloff in semiconductor and AI-infrastructure stocks on Monday. Tuesday’s session carried over some of that caution, though a few beaten-down names bounced back (sources: CNBC, Yahoo Finance).

Stocks in the spotlight: Skyworks jumps on merger optimism, AI names split

Skyworks Solutions (SWKS): up about 10%

Shares jumped roughly 10%. Skyworks’ $22 billion combination with fellow RF (radio-frequency) chipmaker Qorvo (QRVO) has cleared U.S. regulatory review, including the FTC and HSR waiting period, and is entering its final stages before closing this year, CEO Phil Brace said at a Goldman Sachs conference earlier in September. Growing confidence that the deal will close, combined with optimism that Apple’s latest product announcements will boost demand for RF components, appears to have driven the buying (sources: TheStreet, Skyworks investor relations).

Dell Technologies (DELL): +5.65%

Demand for Dell’s AI-optimized servers remains strong, and its order backlog has reached $95 billion, which caught investors’ attention. Even as AI-slowdown worries weighed on chip and AI-infrastructure stocks broadly, Dell’s backlog — backed by real, booked demand — was seen as a reason to buy, and the stock moved higher against the broader trend (source: TheStreet).

Semiconductor stocks (AMD, Qualcomm, and others): a rebound

AMD (Advanced Micro Devices) rose about 2%, and Qualcomm gained more than 4%. Both had been sold off sharply on Monday on AI-slowdown fears. There was no clear positive catalyst; the move looks more like a bounce from oversold levels as investors unwound stretched short-term positions (source: Yahoo Finance).

Enova International (ENVA): down about 24%

Fintech company Enova tumbled after announcing it had withdrawn its regulatory applications with the Office of the Comptroller of the Currency and the Federal Reserve for its proposed acquisition of Grasshopper Bancorp. Investors read the move as a setback for Enova’s growth strategy of acquiring a bank charter. The company’s CEO cited unclear bank-regulatory standards and exposure to political pressure as reasons for withdrawing the applications (source: TheStreet).

Dave & Buster’s Entertainment (PLAY): down about 15.6%

The restaurant and entertainment chain posted a second-quarter loss and missed revenue expectations, and several analysts cut their price targets afterward, triggering a wave of disappointed selling (source: TheStreet).

Sectors and ETFs: money starts spreading out beyond AI

Semiconductor stocks broadly showed signs of stabilizing and bouncing after Monday’s rout, though concerns about a slowdown in AI development haven’t gone away. As money rotated out of AI-related names, cybersecurity stocks saw renewed buying interest. The Vanguard S&P 500 ETF (VOO), which tracks the S&P 500, traded softer in line with the broader index.

Overall, Tuesday’s session suggests that money that had been concentrated almost entirely in AI-related stocks is starting to spread into other corners of the market as AI-slowdown concerns take hold.

What to watch in Japan today

Three things stand out for Japanese stocks following this U.S. session: (1) with the Fed’s decision due the next day, a wait-and-see mood is likely to dominate; (2) higher oil prices and long-term rates tend to act as a headwind for a wide range of stocks through higher import costs and higher discount rates, so it’s worth watching closely; and (3) there was little in the way of major earnings or economic data in Tuesday’s U.S. session, with the market driven mainly by pre-Fed positioning and moves in oil and rates. You can also check out the recap of the prior session (September 14 U.S. market recap: chip stocks slide on the AI “slowdown” debate).

Let’s keep at it, slow and steady. Have a good day!

* This article is for informational purposes only and does not recommend any specific investment. Please make investment decisions at your own responsibility.

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