[U.S. Market Recap] Sept 9: Dow Falls 405 Points for a Third Straight Loss as Meta Jumps 6.5% and Oil Spikes on Iran Tensions

Hey everyone, Hirokichi here. Let’s look back at Wednesday, September 9, 2026, in the U.S. market. All three major indexes — the Dow, the S&P 500, and the Nasdaq Composite — fell for a third straight session, weighed down by a sharp jump in oil prices tied to rising tensions with Iran and a fresh climb in long-term interest rates. At the same time, individual stocks told very different stories: Meta Platforms surged more than 6% on a new AI agent launch, while Apple slipped despite unveiling its first foldable iPhone. Let’s go through the indexes, the drivers, and the stocks that moved the most.

All three indexes fall for a third day — the Dow drops 405 points

As the table shows, the Dow led the declines at -0.77%. The Dow is more heavily weighted toward cyclical and industrial names, which tend to react sharply to rate moves and trade headlines. The CBOE Volatility Index (VIX), often called the market’s “fear gauge,” jumped more than 5% on the day, a sign that investor sentiment turned cautious (source: Investrade Market Review).

Two big drivers behind the selloff

The first was escalating tension with Iran. U.S. forces reportedly struck several tankers linked to Iran’s Revolutionary Guard (IRGC), and Iran reportedly fired ballistic missiles at a U.S. Navy warship (sources: CBS News, Bloomberg). Worries about oil flows through the Strait of Hormuz pushed WTI crude (October contract) up 3.93% to $96.69 a barrel, while Brent crude closed above $101 a barrel for the first time since July. Higher oil prices also stoke inflation worries, which is a headwind for stocks broadly.

The second was rising long-term interest rates. The U.S. Treasury announced it would triple the size of its buyback program for longer-dated government debt to $6 billion, and concerns about bond supply pushed the 10-year Treasury yield up to 4.857% — its highest level since November 2023 (source: CNBC). Higher rates are typically a bigger headwind for tech and growth stocks, whose valuations lean heavily on future earnings, which contributed to the Nasdaq’s decline. On top of that, renewed trade friction between the U.S. and Canada was also cited as adding to investors’ cautious mood.

Stocks in focus

Energy and defense names caught a bid from the oil spike and geopolitical risk, while Meta stood out on its own AI news. Here’s a closer look at each.

Meta Platforms (META): Up 6.5% on the “Muse” AI agent

Meta shares jumped 6.55% to close at $653.69. Trading volume hit 35.2 million shares, roughly double its three-month average of 17.8 million. The catalyst was the launch of Muse, a personal AI agent that can handle tasks like online shopping, booking flights, and managing a calendar on the user’s behalf, offered through a free tier plus $20 and $100 monthly plans (sources: Bloomberg, TechCrunch). Morgan Stanley said the AI agent market could eventually be worth around $30 trillion, and Mizuho Securities called it “the start of a major new product cycle for Meta that isn’t fully priced into the stock yet.” In my view, how Meta puts its massive user base and data to work through this AI agent is going to be one of the most interesting things to watch going forward.

Apple (AAPL): Down more than 1% despite new CEO’s first keynote

Apple held its first product event under new CEO John Ternus, who took over on September 1 after Tim Cook moved to the role of executive chairman at the end of August. The company unveiled its first foldable iPhone, priced at $1,999, along with the iPhone 18 Pro featuring a 2nm chip and upgraded Siri (Apple’s voice assistant) capabilities. Even so, the stock fell more than 1% on the day. Looking back at Apple’s last 24 iPhone launches, the stock has averaged a 0.3% decline (median -0.6%) on launch day itself — a “sell the news” pattern that played out again this time, even though the products themselves were well received (source: The Motley Fool).

ExxonMobil (XOM): Up 2.3% on the oil rally

Oil major ExxonMobil gained 2.3% as the broader energy sector rose alongside crude prices, making it one of the few sectors in the S&P 500 to finish higher on the day. The stock is up roughly 30-40% year to date in 2026 (estimates vary by source), supported by both higher oil prices and solid earnings.

Lockheed Martin (LMT): Up 0.7% on a UBS upgrade

Defense contractor Lockheed Martin closed 0.7% higher after UBS upgraded the stock to buy from neutral, saying the company’s earnings growth potential wasn’t fully appreciated by the market. Renewed tension in the Middle East likely added extra support, as investors rotated toward defense-related names more broadly.

Sector and ETF moves

By sector, energy was one of the few gainers at +0.63%, while industrials fell 1.01%, consumer discretionary fell 1.05%, and consumer staples fell 1.11% — 9 of the S&P 500’s 11 sectors finished lower (source: Trading Strategy Guides). Broad ETFs like VOO and QQQ moved roughly in line with the S&P 500 and Nasdaq, respectively, while dividend and value-oriented ETFs such as SPYD and VYM, which carry heavier energy weightings, may have held up a bit better. I wasn’t able to confirm the exact performance figures for these ETFs on the day, so please take that point as a general reference rather than a confirmed number.

What to watch in Japan today

Following the weaker U.S. session and higher oil prices, Nikkei futures in Chicago were trading around 64,360 as of early morning on September 10 in Japan, down roughly 900 points (about -1.37%) from the previous close (source: Nikkei). On the currency side, the dollar briefly fell to 153.09 yen in New York trading before closing at 153.80, and it dipped as low as 152.89 yen in Tokyo trading at one point, reflecting speculation about a faster pace of Bank of Japan rate hikes and remarks from U.S. Treasury Secretary Bessent that were read as pushing back against yen weakness (sources: Gaitame.com, Zaikei Shimbun).

Three things I’ll be watching today: (1) whether continued tension in the Middle East keeps pushing oil prices higher and keeps interest in resource and trading-house stocks alive, (2) whether the rally in U.S. defense stocks spills over into Japanese defense names like Mitsubishi Heavy Industries, and (3) whether further increases in long-term U.S. rates continue to weigh on high-multiple growth and tech stocks.

For yesterday’s session, you can check my previous U.S. market recap. For more on how I’m managing my own portfolio through markets like this, you can check my full asset disclosure archive here.

A note on the numbers: I’ve cross-checked the figures in this article against multiple overseas news sources, but a few details — such as the exact VIX level and the precise performance of individual ETFs — couldn’t be confirmed, and I’ve said so directly in the text rather than guessing.

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.

Thanks for reading! If you enjoyed this post, a quick click on the banners below would really encourage me.