Stagflation fears resurface as ISM Prices Paid surges and crude oil spikes

Markets opened October on an uneasy footing Thursday, navigating a stagflationary cocktail of hot manufacturing input costs, escalating Middle East conflict, and a 10-year Treasury yield still pinned near 24-year highs. The S&P 500 eked out a gain of 0.19% to close at 7,666.45, while the Nasdaq barely moved, adding just 0.04% to 26,871.60. WTI crude surged 2.71% to $92.87 a barrel, gold added 0.37% to $4,202.30 an ounce, and the dollar index climbed 0.64% to 102.10. The 10-year Treasury yield, despite the day's inflationary headlines, actually fell 6bp to 5.24% as some investors rotated into duration for safety, though the yield remains near levels that have not been sustained in over two decades.

The ISM Manufacturing PMI for September was the session's most consequential domestic data point. The headline reading of 54.5 came in marginally below the consensus of roughly 55.0 and just under August's 54.6, marking the ninth consecutive month of expansion. What seized market attention was the Prices Paid sub-index, which rocketed to 77.9 against a consensus of approximately 72.3, a reading that signals severe upstream cost pressure filtering through the manufacturing supply chain. New Orders rose to 55.3 from 53.7 and Employment climbed to 52.7, so demand is not softening. Fed officials Jefferson, Bowman, and Waller all spoke Thursday, and markets were scrutinizing their remarks for any pushback against the market's current pricing of roughly 38% odds for an October hike, ahead of the October 28 FOMC meeting. A Prices Paid reading of 77.9 hands hawks additional ammunition, and any Fed speaker comfort with the current policy stance will be difficult to sustain if these cost pressures translate into headline CPI.

Geopolitical developments amplified the energy shock. A Wall Street Journal report confirmed the United States is deploying up to 10,000 additional troops to the Middle East, bringing the carrier presence to three battle groups in theater as the US-Iran conflict, which erupted in late February 2026, grinds forward. Crude oil exports through the Strait of Hormuz have recovered to approximately 13.5 million barrels per day on a seven-day average, matching pre-war baselines via naval escorts and pipeline rerouting. Fuel and petroleum product shipments, however, remain at roughly 19% of pre-war volumes. Adding further tightness, China confirmed a suspension of oil product exports effective October 1, reversing the brief July-to-September relaxation and compressing an already strained global refined products market. The combination of events, a recovering but fragile Hormuz crude flow, zero resolution on peace talks, and China removing a supply buffer, explains why WTI pushed past $92 even as the 10-year yield declined.

Cross-asset dynamics Thursday reflected a genuine tug of war between reflation and safe-haven positioning. The dollar's 0.64% advance to 102.10 pressed gold lower in early trade before geopolitical bids lifted the metal back to $4,202.30. Gold's RSI has fallen to 37.2 and the price sits well below both its 20-day moving average of $4,350 and its 50-day average of $4,332, suggesting the metal is technically oversold and vulnerable to a relief rally if Middle East escalation intensifies. WTI at $92.87 sits just above its 50-day moving average of $89, with RSI at 50.5, pointing to room to run toward the $96 20-day average if Hormuz fuel flows deteriorate further. Energy stocks (XLE) outperformed, while rate-sensitive sectors, real estate and utilities, remained under pressure given the 10-year's persistence above 5%. Semiconductor-linked names drew support from South Korea's September export surge of 83.5% year-over-year, with chip exports alone up 263%, a real-world validation of AI-driven demand that pushed the KOSPI up 1.6% to 6,946. Japan's Q3 Tankan large manufacturers index rose to 24 from 22, helping the Nikkei 225 rally 3.1% to 68,840 overnight.

Looking ahead, the inflation picture will dominate through the October 28 FOMC meeting. A Prices Paid reading of 77.9 virtually guarantees that the next CPI and PPI prints will face intense scrutiny for evidence of manufacturing cost passthrough into consumer prices. Friday's session will bring additional Fed commentary and potentially more headlines from Middle East force posture updates. The durability of Hormuz crude recovery is the single most important swing factor for global inflation over the next two to four weeks. Any disruption to naval escort operations or a breakdown in backstage peace talks could send Brent back toward its $96-to-$102 trading range ceiling, which would further complicate the Fed's task of threading the needle between fighting inflation and avoiding a hard landing in a still-expanding economy.