**Allstate's Q3 2026 property-liability combined ratio market centers on expectations for reported underwriting results amid elevated catastrophe losses.** Analyst models point to an auto combined ratio near 88.6 percent, with property-liability overall likely landing in the mid-to-high 80s after incorporating roughly $1.65 billion in Q3 catastrophe losses disclosed in mid-October. This cat load exceeds recent quarters and offsets continued underlying margin gains from rate actions, risk selection, and lower non-cat loss ratios. The 86-88 percent band leads at 50.5 percent implied probability because it aligns with Q2's 86.6 percent result adjusted for the known weather impact, while the market assigns lower weight to sub-86 percent outcomes given the cat headwind and modest probability to 90-plus percent ranges reflecting uncertainty around loss development and reserve releases. Earnings release on November 4 will resolve the market, with any favorable prior-year reserve reestimates or expense discipline potentially anchoring results within the favored interval.