Measles Cases Hit 2150 in U.S. by June 30?

The U.S. measles outbreak is moving fast enough that the market cannot agree on where it stops. The contract asking whether confirmed U.S. measles cases reach 2,150 by June 30 sits at 51.5% implied probability, essentially a coin flip. That pricing reflects a genuine data problem: the CDC is reporting new cases weekly, the outbreak is geographically dispersed, and five weeks remain before resolution.

The market question is whether confirmed U.S. measles cases hit 2,150 by June 30, 2026. YES trades at $0.52 and NO trades at $0.49. Total volume is $3,057, with $1,941 traded in the last 24 hours. This market resolves June 30, 2026.

How the 2,150 Threshold Works

The contract resolves YES if the CDC confirms 2,150 or more measles cases in the United States on or before June 30, 2026. The CDC’s Morbidity and Mortality Weekly Report is the authoritative data source. Resolution depends on the official cumulative count, not media estimates or state health department tallies.

• YES ($0.52, 51.5%): CDC confirms 2,150 or more cases by June 30, 2026.
• NO ($0.49, 48.5%): CDC cumulative count stays below 2,150 through June 30, 2026.

For the contract to pay out on the NO side, the CDC case count must stall below 2,150 for the next five weeks. Measles transmission slows when outbreak containment measures take hold, when vaccination rates rise in affected communities, or when seasonal school-year patterns reduce exposure. The CDC has intensified outbreak response in Texas and other high-incidence states. If those interventions slow weekly case additions enough, the cumulative count may not reach the threshold before the June 30 deadline.

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Momentum and Market Signals

The momentum picture here is genuinely mixed. The 1-hour price change is down 14%, while the 24-hour change is up 6.5%. The trend score sits at 56.35, which is slightly above neutral. That pattern, a sharp short-term pullback inside a modest daily gain, suggests the market is digesting new CDC case data rather than trending with conviction in either direction.

Total market volume is $3,057, with $1,941 traded in the last 24 hours. Liquidity stands at $4,483. This is a thin market by any measure. Volume well below $1 million means a single large trade or a fresh CDC report can move the price sharply. The 24-hour volume representing more than 60% of total volume tells you this market only recently became active, likely in response to the late-May case count data.

• The 1-hour price drop of 14% likely reflects a trader reacting to specific CDC data, not broad sentiment shift.
• The 24-hour gain of 6.5% aligns with the May 28 price movements visible in recent trading history, suggesting positive case-count news drove the daily direction.
• The trend score of 56.35 indicates slight YES-side lean but no strong directional conviction.
• Thin liquidity means the spread between YES and NO ($0.52 vs. $0.49) can widen or collapse on a single weekly report.
• Related markets show 100% probability that U.S. measles cases exceed some baseline in 2026, confirming the outbreak is real. The 2,150 threshold is the specific number being contested.

Lines Analysis: The 2,150 Number and What Drives It

The CDC’s 2025 measles outbreak was the largest in years, and 2026 case counts have continued rising through the spring. The United States crossed 1,000 cases earlier in 2026, and the trajectory toward 2,150 depends entirely on whether the weekly addition rate has peaked. At the outbreak’s most active phase, the CDC was recording dozens of new cases per week. Five weeks at that pace closes the gap to 2,150. The data as of late May puts the market at even odds because the current count is close enough to the threshold that the resolution is genuinely uncertain.

The barrier to YES is not immunity or policy, it is time. If the CDC count is already near or above 2,100, the remaining distance to 2,150 is small and almost certainly covered by June 30. If the count is closer to 2,000, containment efforts in Texas, Ohio, and other outbreak centers need to fail for YES to resolve. The CDC’s outbreak response, including emergency vaccination campaigns in affected schools and communities, is the most direct variable. A measles outbreak that loses its primary transmission cluster can stall quickly.

• Any CDC weekly report showing continued double-digit case additions pushes YES probability higher.
• A CDC announcement of contained transmission in the Texas or Ohio clusters would favor NO.
• State health department reports from high-incidence counties serve as leading indicators before CDC confirms nationally.
• School year end in late May and early June reduces institutional transmission, which historically slows outbreak momentum.
• A new geographic cluster emerging in an under-vaccinated community before June 30 is the clearest YES catalyst.

Total market volume of $3,057 is low. The 51.5% probability reflects genuine uncertainty, not strong market conviction. The data slightly favors YES given the outbreak’s sustained pace, but containment variables make this closer to a probabilistic coin flip than a directional bet. Here’s what the measurements are telling us: the case count is close to the threshold, the outbreak is not contained, and five weeks is enough time for either outcome.

LINES VERDICT

MARGINAL YES LEAN

The U.S. measles outbreak has sustained enough weekly case volume to put 2,150 within reach by June 30, but thin market liquidity and genuine containment uncertainty make this a close call rather than a resolved question.

What the market says: At 51.5% implied probability, the market is pricing near-maximum uncertainty. Five weeks to resolution means a single CDC weekly report or a containment breakthrough can reprice this contract sharply.

Key unknown: The CDC’s next weekly case count update is the single most important data point. If the cumulative total is already above 2,100, the threshold is almost certain to fall. If the count is at or below 2,050 with transmission slowing, NO becomes the more defensible position.