What is the current probability?

As of the latest cache refresh, the YES contract trades at 8%, implying a 8% chance of YES.

When does this market close?

This market closes on Jan 31, 2027. After close the venue settles the contract based on the official resolution source.

K KalshiHealth

Settles Jan 31, 2027 (92d) All outcomes: Will there be a case of polio in the USA this year?

chance of YES8% -3.0pp in 24h

Price range (120d)

5–17%

30d -42 pts · 7d -36 pts

24h volume

177

$1 contracts

Open interest

6.6K

contracts outstanding

Large orders (14d)

—

none recorded

daily, 120 days

Line: daily closing YES price (= implied probability). Bars: contracts traded.

Open on Kalshi

We don't execute trades; odds are aggregated from public data.