Elevated West Nile virus detection in over 1,284 mosquito pools across all NYC boroughs—nearly double the prior year’s pace—drives trader focus on transmission risk through late summer and early fall. Only one neuroinvasive disease case has been confirmed among residents as of mid-August, consistent with typical onset patterns but well below recent annual averages of 25–31 cases. Warmer temperatures and precipitation patterns have expanded mosquito breeding and viral amplification in Culex vectors, while intensified surveillance, larviciding, and public advisories introduce uncertainty about final totals. Historical variability in case counts, combined with the remaining peak transmission window and potential underreporting of milder infections, keeps market-implied probabilities closely split between fewer than 20 and 20–34 cases.