What are the odds of "Yes" for "1,600+ Measles cases in U.S. by October 31?"?

Currently 100% probability according to Polymarket prediction market traders.

What are the odds of "No" for "1,600+ Measles cases in U.S. by October 31?"?

Currently 0% probability according to Polymarket prediction market traders.

1,600+ Measles cases in U.S. by October 31?

Current odds

Live · updates every 20s

YES

100%

PRICE $1.00 · IMPLIED 100%▸ BUY YES

PRICE $0.00 · IMPLIED 0%▸ BUY NO

Price history

OPEN 24H

0.96

Yes

HIGH 24H

0.99

at 11:42 ET

LOW 24H

0.93

at 02:18 ET

CHANGE

+0.04

+7.0% on Yes

Market stats

Polymarket · CLOB

24H VOLUME

—

Past 24 hours

TOTAL VOLUME

$27k

Since creation

LIQUIDITY

Available to trade

Recent trades

Last 10 fills · live

TIME	SIDE	PRICE	SIZE	VALUE	TRADER

About this market

Context

This market will resolve to "Yes" if there have been 1,600 or more confirmed cases of Measles (Rubeola) in humans in the territory of the United States of America in 2025, according to the CDC case counter by October 31, 2025, 11:59 PM ET. Otherwise, this market will resolve to "No". The resolution source for this market will be the CDC Measles (Rubeola) counter (see: https://www.cdc.gov/measles/data-research/index.html) at the resolution time. If the counter becomes unavailable, another credible source will be used. Note: Only cases reported by the CDC Measles (Rubeola) counter will qualify, regardless of reports from U.S. State agencies or other sources.

How trading works

Polymarket uses a central limit order book (CLOB) model — you can buy or sell shares of any outcome at the current market price, or place limit orders at your target price. All positions are settled in USDC when the market resolves.

Resolution

Markets resolve through UMA's Optimistic Oracle. After the market closes, a proposer submits a resolution, followed by a 2-hour dispute window. If no dispute is raised, the resolution is accepted. Disputed markets go to UMA token holder vote.

FAQ

Resolution & trading

How is this market resolved?+

The market resolves based on the official outcome as verified by the UMA Optimistic Oracle.

When does this market close?+

Trading closes at Oct 31, 2025 · 12:00 AM UTC. After close, the UMA oracle proposes a resolution and a 2-hour dispute window opens before final settlement.

What are the possible outcomes?+

The possible outcomes are: Yes (100%), No (0%). Each contract pays out $1 if correct, $0 otherwise.

What happens if the resolution source is unavailable?+

If the primary resolution source is unavailable, the market may be delayed or resolved by UMA oracle vote using credible alternative sources. Polymarket's optimistic oracle has final authority on disputed resolutions.

How do I trade on Polymarket?+

You need a Polymarket account (sign up with email or crypto wallet). Connect a Polygon-compatible wallet, fund it with USDC, and you can buy or sell shares of any outcome at the current market price. All settlements are in USDC.