Dow drops 350 points as 10-year Treasury yields hit 5.1%

• The probability of a 25-basis-point Fed rate hike in October jumped to above 66% from 55.4% a day earlier and just 8.8% a month ago, following strong September PMI data showing business activity at a five-year high.
• Oil prices surged 4.4% (Brent to $103.67) on Iran-US tensions, adding to inflation concerns and reinforcing the case for continued Fed tightening.
• Technology stocks led declines with Alphabet down 2.9%, Amazon falling 2.2%, and Nvidia dropping 1.8%, though the S&P 500's valuation fell to just under 19x forward earnings, its lowest since 2023.

Market Summary: Dow Drops 350 Points as Treasury Yields Surge

Market Performance:

U.S. equities closed sharply lower on Wednesday, September 23, 2026, as rising Treasury yields sparked concerns about additional Federal Reserve rate hikes. The Dow Jones fell 352.10 points (-0.68%) to 51,511.59, the S&P 500 declined 0.75% to 7,706.05, and the Nasdaq dropped 1.13% to 26,936.04. Nine of eleven S&P 500 sectors finished lower, led by utilities (-1.72%) and communication services (-1.49%).

Key Driver – Treasury Yields:

The 10-year Treasury yield surged to 5.1%, its highest level since July 2007, marking the largest one-day move since April 2025. The 2-year yield climbed to 4.947%, the highest since May 2024. Strong September PMI data showing business activity at a five-year high fueled expectations for continued Fed tightening. The CME FedWatch Tool now shows a 66% probability of a 25-basis-point October rate hike, up from 55.4% the previous day and just 8.8% a month ago.

Geopolitical Impact:

Oil prices rallied on U.S.-Iran tensions, with Brent crude gaining 4.4% to $103.67 and WTI up 2.6% to $92.91, adding to inflation concerns.

Sector Highlights:

Technology stocks led declines, with Alphabet down 3%, Amazon falling 2.2%, and Nvidia dropping 1.8%. The PHLX Semiconductor Index declined 1.2%. Meta Platforms bucked the trend, rising 1% on positive reception for its Muse AI assistant. Travel stocks Expedia and Airbnb both plunged over 7%.

Valuation:

The S&P 500 now trades at under 19x forward earnings, its lowest valuation since 2023, sitting less than 2% below its August 13 record high.