Chicago Air Quality Index below 100 by July 20, 2026?

Resolved

No, settled Jul 23, 2026 UTC

Yes

0.0%

100.0%

Final Yes 0¢Final No 100¢

Lifetime volume

$3.4K

Resolved

Settled

Jul 23, 2026 UTC

Where it stands

Resolved No on 23 Jul 2026.

The last daily price before settlement had No at 100%. Yes opened at 86.5% on 18 Jul 2026. Before it settled, across the 6 daily closes on record from 18 Jul 2026 to 23 Jul 2026, the highest close was 88.5% on 19 Jul 2026 and the lowest 0.1% on 23 Jul 2026. Its largest one-day move was 43 points down, to 2.9% on 21 Jul 2026. $3.38K traded over the market's life.

13 wallets still hold shares. Winners redeem theirs after settlement, so what is left is mostly the losing side.

Polymarket record as of Jul 23, 2:02 PM UTC

Price historyPrice history from Polymarket's order book

Daily closes of the Yes price, Polymarket CLOB, 6 points, 18 Jul 2026 – 23 Jul 2026

Yes price, first and latest
Observed	Yes price
18 Jul 2026	86.5%
23 Jul 2026	0.1%

Holders left after settlement

Winners have redeemed their shares, so most of what is left is the losing side.

Trader	Outcome	Shares
TENETENET	Yes	100
.Menthe	Yes	50
Elias.Thornwell	Yes	38.88
TeenagePanda	Yes	17.21

10 of 13 listed holders. Polymarket publishes up to 500 per outcome; the Holders tab has them all.

Read the record behind the trader

Open a trader’s name to inspect the wallet’s available P&L, positions and recorded trades, with source dates and coverage. A large position alone does not establish a winning track record.

Rules

How this market was settled

This market will resolve to "Yes" if "Chicago" has a PM2.5 Air Quality Index of below 100 between July 17, 2026 and the specified date. Otherwise, this market will resolve to "No". This market's resolution source will be https://www.airnow.gov/state/?name=illinois. To get to the figures used to resolve this market, select the "Historical Air Quality" tab, then find the finalized figure for the"Chicago" row under the "Daily AQI for PM2.5" column. This market may remain open for two days after the specified date to confirm the daily AQI figures for the specified timeframe. If the figures remain unavailable, another credible resolution source will be chosen.