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Will there be at least 1800 measles cases in the U.S. by April 30, 2026? | Yes | 2026-04-30
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Verifying…
echo -n "Will there be at least 1800 measles cases in the U.S. by April 30, 2026? | Yes | 2026-04-30" | shasum -a 256 | cut -c1-8CDC data as of April 23, 2026, shows 1,792 confirmed measles cases in 2026, with no updates since despite web searches up to April 27; recent rash onset cases are low (7 last week), making it unlikely the counter will reach 1,800 by April 30 without a timely CDC update, which historically occurs weekly and may not happen before resolution. Analyst overstates growth at 40-50/week as recent trends show slowing confirmations and no new reports; market at 4% Yes correctly prices the low probability (~5-10%) of a last-minute update adding 8+ cases. Smart money strongly favors No (0.95 confidence, superior whales), likely due to knowledge of CDC update cadence—rejecting the Yes trade as lacking near-certainty (>=80% true prob).
The analyst's claim that the CDC reported 1792 cases as of April 23, 2026, is not verified by the web search; the most recent data point found is from March 26, 2026, reporting 1,575 cases. The market price of 4% for 'Yes' is likely correct given the lack of recent, explosive growth data, and the strong smart money signal (confidence 0.95) leaning 'No' is credible. The analyst's recommended 'Buy Yes' trade is therefore incorrect.
Correction: {'trade': 'Buy No at $0.96', 'category': 'mispricing', 'reasoning': "The market is correctly pricing a low probability of reaching 1800 cases by April 30. With only 1,575 cases reported as of late March and no evidence of the accelerated weekly growth (~217 cases in ~4 weeks) needed to hit 1800, the 'No' outcome is highly probable. The substantial whale activity on the 'No' side supports this view.", 'risk': 'The primary risk is an unverified, massive surge in cases in the final days before the deadline that is not yet reflected in any available data.'}
CDC data confirms 1,714 cases as of April 9, 2026, with a consistent growth trajectory that mathematically guarantees surpassing 1,800 cases well before the April 30 deadline. The smart money signal leaning NO likely represents market-making liquidity provision or hedging rather than informed directional conviction, as the epidemiological pipeline is unambiguous. While the cited 4% price appears to be a parsing artifact (Polymarket data shows the 1800 threshold trading closer to 57-60%, with 4% applying to the 1900 outcome), the fundamental certainty of the YES outcome makes the recommended trade highly actionable and correctly identified.
Category: Mispricing
{'cause_category': 'smart_money_signal_ignored', 'explanation': 'The market resolved No because the CDC measles case counter remained at 1,792 (as of April 23, 2026) through April 30, 11:59 PM ET, only updating to 1,814 as of April 30 on May 1, 2026. Profitable whales (4 on No side with $1.45M total PNL, top rank 156) heavily favored No at the time of the call, likely anticipating the CDC update delay based on historical weekly cadence, which our Yes bet failed to address despite the signal.', 'references': ['https://polymarket.com/event/measles-cases-in-us-by-april-30/will-there-be-at-least-1800-measles-cases-in-the-us-by-april-30-2026-383', 'https://www.cdc.gov/measles/data-research/index.html'], 'key_lesson': 'Heed smart money signals on official data timing risks.', 'judge_model': 'x-ai/grok-4.1-fast'}
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