(Updates with index/price moves and company/geopolitical news from the first paragraph.)
US equity indexes fell after a surge in private-sector growth to the highest in more than five years lifted bets for a back-to-back interest rate increase in October and sent government bond yields sharply higher.
The Nasdaq Composite dropped 1.1% to 26,936.04 on Wednesday, retreating from an all-time high. The Dow Jones Industrial Average fell 0.7% to 51,511.59, and the S&P 500 slid 0.7% to 7,706.03. All sectors except energy declined. Communication services, utilities, and consumer discretionary led decliners.
US Treasury yields jumped after US private-sector output growth accelerated to a 62-month high in September amid strength in both services and manufacturing, while price pressures intensified. The 10-year yield soared 14.1 basis points to 5.11%, and the two-year rate surged 12.4 basis points to 4.9%.
S&P Global's (SPGI) flash purchasing managers' index data released Wednesday showed September's composite output gauge increased to 58.4 from 56 in August, marking a fourth straight monthly rise. The consensus was for 55.3 in a survey compiled by Bloomberg.
"To put the growth surge in context, barring the spike in demand following the opening up of the economy after the COVID-19 lockdowns, the latest improvement in business activity is the greatest recorded since early 2015," S&P Global Market Intelligence Chief Business Economist Chris Williamson said.
Mortgage applications in the US fell last week as a key 30-year rate crossed 7% to reach the highest level in over two years, potentially worsening ongoing affordability challenges. The Mortgage Bankers Association's market composite index, which measures loan application volume, decreased 1.5% sequentially in the week through Sept. 18, the association said.
Traders are now pricing a 69% probability that the Federal Reserve will raise its target rate range for federal funds by 25 basis points to 4% to 4.25% in October, up from 55% a day earlier and 9% a month ago, according to the CME FedWatch tool. The Fed raised rates by the same magnitude last week.
Iran's President Masoud Pezeshkian told the United Nations that Tehran will not surrender to the pressures being brought on by the US, while saying he is of the view that diplomacy is the way to end the war, Reuters reported Wednesday. This comes as US President Donald Trump warned on Tuesday that he could annihilate Iran if there is no deal to end the war, but also suggested an agreement could come soon, the news report said.
US Secretary of State Marco Rubio said that US-Iran mediated talks on the sidelines of the United Nations General Assembly failed to achieve any significant breakthrough, CNN reported Wednesday.
The front-month US West Texas Intermediate crude oil contract jumped 2.6% to $92.83 per barrel, and the global benchmark North Sea Brent shot up 4.4% to $103.66 per barrel amid worsening Iran geopolitics.
Palo Alto Networks (PANW) shares jumped 5%, the top gainer on the S&P 500 and the Nasdaq, a day after the company launched Unit 42 Continuous Frontier AI Defense, an agentic offensive security service, integrating Anthropic's Claude Mythos 5, OpenAI's GPT-5.6-Cyber, and open-weight models.
Paychex (PAYX) shares slumped 8.8%, the steepest drop on the S&P 500 and the Nasdaq, after the company reported fiscal Q1 revenue growth in line with market expectations, while management reiterated its full-year outlook amid a tough comparison in the current quarter.
McDonald's (MCD) said Wednesday it will provide $8.5 billion in support to franchisees through 2036 to accelerate restaurant modernization, technology deployment, and operational improvements. Shares dropped 4.8%, the Dow's worst performer.