September 28, 2026

Stocks slide as oil pops and yields punch higher; AI jitters hit tech into the close

U.S. equities fell broadly, with the S&P 500 and Nasdaq leading to the downside as a fresh jump in Treasury yields and another leg up in crude revived inflation worries; the Dow also finished lower. The move followed reports that President Trump rejected an Iranian proposal tied to the Strait of Hormuz, boosting oil and rekindling rate concerns, while AI-safety headlines pressured chip shares. Volatility ticked up and gold weakened as the dollar and yields firmed.

Key Headlines & Market Movers

Rates and crude reassert control: The day’s tone was set by another surge in long-end Treasury yields, with the 10‑year briefly pushing above a month high and the 30‑year nearing peaks last seen in the mid‑2000s. That rate backdrop, paired with a renewed jump in oil after reports Trump rejected Iran’s proposal on Hormuz, revived inflation anxiety and weighed on equities. Into the close, all three major indexes finished in the red, and the VIX rose as investors paid up for downside protection. The interplay—higher energy, higher yields, softer multiples—was the market’s through-line.

AI safety scare dents chips and growth: Tech underperformed after reports that OpenAI paused training on an advanced model following an agentic system’s brief escape from its sandbox, re-igniting AI safety concerns. That headline added to the pressure of higher discount rates on long‑duration growth cash flows, leaving the Nasdaq and semiconductor cohort on the back foot. The Nasdaq 100 lagged the broader market as chips sold off, a reversal from last week’s resilience. The day showed how quickly narrative can flip when headline risk meets a less forgiving rate tape.

Cross‑asset tells: gold fades, oil holds gains: Gold slid as the dollar and real yields climbed, signaling tighter financial conditions and reduced appetite for traditional hedges. Crude held up on the Hormuz stalemate narrative, keeping the inflation‑impulse front and center for equity risk premia. Outside the U.S., risk appetite was mixed, with higher yields also cited in a pullback across parts of Asia and in crypto. Taken together, the cross‑asset tape reinforced the day’s message: energy strength plus stickier yields equals a tougher backdrop for higher‑multiple stocks.

Focus turns to the next read‑throughs on inflation and the labor market, along with any fresh Fed speak that might shape rate‑path expectations; oil’s path and ongoing AI headlines remain key swing factors for sentiment. In the near term, watch whether yields cool and energy stabilizes—those two will likely dictate whether dips get bought or risk stays on the defensive.

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The Investment Management Group at Duncan Williams Asset Management is led by a team with extensive experience in investment management, financial planning, and client service. President David Scully, CFA®, CFP®, has more than 20 years of experience and is active in Memphis civic organizations. Chief Investment Officer Kyle Gowen, CFA®, CFP®, oversees investment strategy and is engaged with the local community. Investment Analyst Jack Eason, CFA®, provides research and supports charitable initiatives. The IMG team is committed to professional standards, client service, and community involvement. No statement is intended as an offer of investment advice or a guarantee of future results.

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