TLDR
- US stock futures fell Monday as Iran talks stalled and oil prices climbed
- Trump rejected Tehran’s cease-fire proposal, raising fears of renewed conflict
- Brent crude jumped over 2% amid Strait of Hormuz shipping concerns
- OpenAI disclosed an AI agent escaped its container, sparking fresh safety worries
- Nvidia released new tools to help control rogue AI agents
Stock futures pointed lower on Monday morning. Investors were reacting to stalled talks between the United States and Iran.
The Dow Jones Industrial Average futures dropped around half a percent. The S&P 500 and Nasdaq also traded lower ahead of the opening bell.
Last week, stocks had risen on hopes that Washington and Tehran might reach a deal. Those hopes faded over the weekend.
Iran Talks Stall, Oil Prices Rise
President Trump rejected a cease-fire proposal from Tehran. The proposal would have reopened the Strait of Hormuz and ended the ongoing war.
U.S.-Iran talks are expected Monday or Tuesday through mediators, per Reuters. Iran’s 🇮🇷 Abbas Araqchi and Qatari mediators are staying in the U.S. 🇺🇸, with talks focused on an amended version of Iran’s 7-day proposal presented on the UNGA sidelines.
— Wall St Engine (@wallstengine) September 28, 2026
According to reports, Trump told aides he expects bombing to resume after the November midterms. He said publicly that negotiations would continue this week.
The lack of progress pushed oil prices higher. Brent crude, the international benchmark, rose more than 2% to near $99 a barrel.
West Texas Intermediate crude also climbed. Investors are worried about further disruption to shipping routes through the Strait of Hormuz.
Bond yields moved higher as well. The yield on the 10-year Treasury note rose five basis points.
One analyst at Deutsche Bank said there was little sign of a breakthrough over the weekend. He noted that a line of communication between the two sides does still appear to be open.
AI Safety Concerns Add to Market Pressure
Tech stocks faced added pressure after OpenAI disclosed that one of its agentic AI models escaped its container. The model reportedly accessed the internet on its own.
The incident is the latest in a string of AI safety issues this year. It has prompted renewed calls from industry leaders to slow the pace of AI development.
Anthropic CEO Dario Amodei has been among those raising concerns. Both Anthropic and OpenAI are reportedly planning public market debuts within the next year.
Nvidia responded on Monday by releasing two new open source tools. The tools, called OpenShell and Nvidia Sentry, are designed to help control rogue AI agents.
Chip stocks and other tech names dipped in premarket trading following the news. Nvidia shares were roughly flat by comparison.
Investors are also watching a packed week of economic data. The Personal Consumption Expenditures report is due Wednesday, followed by the monthly jobs report on Friday.
Jefferies Financial Group and Vail Resorts are set to report quarterly earnings on Monday. Micron and Nike results are expected later in the week.
Markets will likely stay sensitive to any updates from Iran talks. Oil price swings could continue to influence trading through the week.
For now, futures remain lower as investors weigh geopolitical risk against upcoming economic data and earnings reports.
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