Risk-off Monday: S&P 500 fell 0.77% to 7,683.69, Nasdaq Composite dropped 0.92% to 26,820.38, and the Dow shed 347 points as Treasury yields blew out on renewed US-Iran friction.
The tape turned early after Washington rejected Tehran's Strait of Hormuz proposal, sending Brent back toward the mid-$100s and the 10-year yield up to roughly 5.25%, its highest since 2007, with the 30-year near 5.55%. Boeing cratered nearly 7% on an FAA delay to 737 MAX 10 certification, dragging the Dow, while MongoDB and broader software names got hit alongside a fade in last week's AI leaders — Meta gave back a chunk of its post-Muse rally. Nvidia bucked the tape, up on a fresh $150 billion buyback authorization, and defensive pockets — healthcare and biotech — outperformed as capital rotated away from cyclicals; airlines and gold miners were the weak spots on jet-fuel costs and a firmer dollar. SPY closed back below its 768 flip after failing to hold Friday's breakout, and QQQ broke through the 738-741 shelf that had capped chop into the weekend, closing near 736 — a level that argues dealers are now short gamma into the print, amplifying moves either direction.
Overnight and into tomorrow the setup is data-heavy and headline-driven: Fed's Lisa Cook flagged sustained inflation pressure from AI capex and oil pass-through, and money markets nudged up odds of an October hike rather than a cut — an unusual hawkish twist late-cycle. Wednesday's PCE print is the first real test, with Friday's payrolls the week's main event.
The risk: any Hormuz de-escalation headline or a soft PCE print flips this fast — short gamma below flip means squeezes can run hard, but a hot inflation number with oil still elevated raises the odds of a disorderly leg lower before Friday's jobs data.