The September 2026 ISM Services PMI print of 54.9, down 0.5 points from August and slightly below the 55.0–55.1 consensus, has shifted trader consensus toward further moderation in the October reading due November 4. Persistent price pressures, with the prices-paid index climbing to 74.0—the highest since mid-2022—alongside slower business activity and supplier delivery strains, underscore elevated input costs that could weigh on the headline index. Employment’s modest rebound to 50.1 offers limited offset, while new orders remain supportive near 59.8. With services comprising the bulk of U.S. activity and recent prints aligning near the 12-month average of 54.1, Polymarket’s distribution—led by the 53.0–53.9 band at 31.5% implied probability—reflects uncertainty over whether the cooling trend persists or stabilizes amid resilient demand and broader growth signals.