How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?

According to the latest prediction market data for the query “How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?”, traders have formed a strong consensus.

Currently, 20 to 34 is dominating the market with an overwhelming 74% chance of winning. 35 to 49 follows in second place at 25.7%, while 50 or more sits in third with 0.4%. The betting volume for this specific market has already reached $89.6K, reflecting intense industry interest.

To better assess where each potential outcome stands, the market can be segmented into three distinct trading tiers based on implied probability and contract pricing:

🥇 Tier 1: The Dominant Leader

• 20 to 34 (74%): Currently commanding the highest probability, 20 to 34 is heavily favored by the order book. Traders looking to back this outcome face a “Buy Yes” contract price of 74¢, signaling a high degree of market conviction. This contract alone has generated $37.5K in volume.

🥈 Tier 2: The Primary Challengers

• 35 to 49 (25.7%): Positioned as the most viable alternative, 35 to 49 maintains a 25.7% chance of resolving true. Its “Buy Yes” shares currently trade at 26¢.
• 50 or more (0.4%): Sitting in third place with a 0.4% probability, the market shows measured skepticism toward 50 or more, treating it as an outside wildcard unless momentum shifts.

🥉 Tier 3: The Long-Tail Options (Combining for ~0%)

Beyond the top three choices, a wide field of macro variables and long-shot outcomes are being tracked. While their individual probabilities hover low, they represent crucial hedges for speculative traders:

• Alternative Options: This includes Fewer than 20 (0.1%).
• Speculative Volume: Despite low statistical likelihood, certain long-tail contracts like Fewer than 20 are still attracting notable interest.

This market resolves based on the total number of West Nile neuroinvasive disease cases (encephalitis, meningitis, and acute flaccid paralysis) reported among New York City residents in 2026, as published by the New York City Department of Health and Mental Hygiene on its West Nile Virus Reports page at nyc.gov/site/doh/health/health-topics/west-nile-virus-reports.page.

Cases are counted as whole numbers, so each outcome covers a distinct range with no overlap or gap.

The 2026 count shown on the source as of January 1, 2027 is the starting figure.

If the DOHMH publishes or revises the 2026 count on or after January 1, 2027, this market will resolve based on the count shown on the source at 11:59 PM ET on the 14th day after the first such update, or on March 31, 2027, 11:59 PM ET, whichever comes first. If no such update occurs, this market will resolve on March 31, 2027, 11:59 PM ET, based on the 2026 count shown on the source at that time.

If no 2026 count has been published on the source by March 31, 2027, 11:59 PM ET, this market will resolve based on the sum of 2026 West Nile neuroinvasive disease case counts reported by CDC ArboNET for the five New York City counties (Bronx, Kings, New York, Queens, and Richmond). Revisions published after this market resolves will not be considered. If the DOHMH changes its reporting format or URL structure, the closest equivalent NYC Health Department publication of 2026 West Nile neuroinvasive case data will be used.

While human consensus and speculative volume shape the broader prediction market, our quantitative algorithms offer a data-driven counter-perspective. By analyzing fundamental signals, underlying trends and historical distributions, our AI Valuation model calculates an independent “Fair Value” probability for each outcome.

Comparing this Fair Value against the current Trade Value uncovers major disparities — known as the Expected Value (EV) Gap. Contracts with a positive EV Gap represent statistically underpriced outcomes, whereas a negative EV Gap flags a potential market overreaction.

Top AI Alpha & Mispriced Arbitrage Opportunities

Based on the latest data model run, several key contracts stand out with significant deviations:

• The Most Overvalued Outcome 20 to 34 currently trades at 74%, but our AI places its Fair Value at just 57.5%. This creates a large negative EV Gap of -16.4%, suggesting the crowd may be overhyping this outcome and driving the premium too high.
• The Best Value Play (Highest EV) Our model identifies Fewer than 20 as the premium value opportunity on the board. While the market only assigns it a 0.1% trading probability, our AI’s Fair Value assessment sits at 24.4% — yielding an impressive +24.3% EV Gap.
• Under-the-Radar Dark Horses Other notable discrepancies include 50 or more (EV Gap: +1.5%). These long-tail opportunities are heavily discounted by the live order books despite stronger statistical backing from our predictive model.