Services Inflation Spike and Hormuz Tensions Keep Markets on Edge

Equities pushed higher Monday even as bond markets absorbed fresh inflationary signals, with the S&P 500 closing up 0.66% at 7,773.95 and the Nasdaq gaining 1.05% to 27,477.31. The advance came despite the 10-year Treasury yield rising 3bp to 5.31%, a level that sits well above its 20-day and 50-day moving averages and with an RSI of 75.8 deep in overbought territory, suggesting the bond selloff may be extended. The dollar index edged up 0.24% to 102.17, continuing its march above both its SMA20 and SMA50 near 100, with an RSI of 73.1 flagging stretched positioning. Risk assets appeared to take comfort in equity momentum while largely shrugging off the dual headwinds of sticky services inflation and an unresolved conflict in the Persian Gulf.

The September ISM Services PMI, released at 10:00 ET, delivered the session's most consequential data point. The headline index came in at 54.9, slightly below both the prior 55.4 and the consensus of 55.0, marking the 27th consecutive month of expansion. The Prices Paid sub-index, however, was the real jolt, surging to 74.0 from 72.6, the highest reading since July 2022 and well above the consensus of approximately 72.9. That re-acceleration in services cost pressures arrives just as last week's labor market data had briefly revived hopes of a more dovish Federal Reserve posture heading into October. The Employment sub-index recovered to 50.1 from 47.8, while Business Activity fell sharply to 56.5 from 61.7, a mixed internal picture that complicates any straightforward read on demand conditions.

On the geopolitical front, Iran's IRGC intercepted a tanker transiting the Strait of Hormuz and ordered it to turn back, the vessel complying without escalation to seizure. Iran's parliament speaker reiterated that the strait will not reopen until seven conditions derived from the Islamabad Memorandum are satisfied, and US-Iran nuclear negotiations remain stalled with only back-channel contacts ongoing. Despite these disruptions, WTI crude fell -1.84% to $89.43, hovering right at its 50-day moving average of $89, with Middle East oil exports having clawed back above pre-war levels through US naval escorts and ship-to-ship transfers. Brent crude remained above $100 per barrel. Gold slipped -0.13% to $4,156.80, continuing to trade well below its SMA20 of $4,323 and SMA50 of $4,334, with an RSI of 34.2 approaching oversold territory, a notable divergence from what would normally be a supportive geopolitical backdrop.

The cross-asset picture reveals a market wrestling with competing narratives. Equities are holding above key technical support, with the S&P 500 trading above both its SMA20 of 7,671 and SMA50 of 7,659, while the Nasdaq's RSI of 66.9 reflects momentum that has yet to reach overbought levels. Energy sector positioning faces a contradictory setup: crude is softening on supply resilience even as the Hormuz situation remains unresolved, leaving energy equities caught between geopolitical risk premium and demand-side uncertainty. The dollar's strength, feeding off the repricing of Fed rate-cut expectations in the wake of the Prices Paid surge, creates headwinds for emerging market assets and commodities priced in dollars, gold's continued weakness being the clearest expression of that dynamic.

Heading into the rest of the week, the Fed's October meeting calculus grows more complex with each inflation data point. A Prices Paid sub-index at its highest in over four years forecloses aggressive easing and may force the committee to hold rates higher for longer even as growth signals soften. Any escalation in the Strait of Hormuz, whether Iran moves from interception to outright seizure or the US responds with expanded naval action, could quickly reverse the current orderly adjustment in crude prices and reignite the inflation trades that have been fading. Federal Reserve speakers scheduled through the week will be parsed closely for any signal on whether the services inflation re-acceleration is being treated as transitory noise or a genuine shift in the committee's tolerance for holding rates steady through year-end.