Elevated West Nile virus transmission in New York City this season, driven by record mosquito pool positivity exceeding 1,700 detections citywide since June, has positioned the 35–49 neuroinvasive case range as the market-implied favorite at 62.5%. Official NYC Health Department surveillance reports 31 neuroinvasive cases through mid-October 2026, already surpassing the full-year 2025 total and aligning with the recent 2021–2025 average of roughly 25–31 annually, though below peak years like 2022. Warmer temperatures and extended mosquito activity have sustained higher vector prevalence across all boroughs, with Brooklyn reporting the most cases, while the season’s typical decline after September supports trader consensus that totals will likely settle in the moderate-to-elevated band rather than extremes. Remaining October surveillance updates and any late-season model shifts could still adjust final counts before 2027 resolution.