Loading your workspacePreparing the page and its market data.
Loading the chart…
| Outcome | Chance | 24h | 1 week | Bid · Ask | 24h volume | Ends |
|---|---|---|---|---|---|---|
| July 18 | 0% | −2 pts | — | — · <1¢ | — | ended |
| July 20 | 100% | +1 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| July 19 | 100% | +3 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| July 21 | 100% | +1 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| When | Trader | Outcome | Bet | Size | P&L now | Insider |
|---|---|---|---|---|---|---|
| 95d | 0x8931…a90c | July 18 | BuyNo>99¢ | $1,003 | +$1 +0.1% | 4 |
| 97d | 1walrus | July 20 | BuyYes95¢ → 100¢ | $1,250 | +$73 +5.8% | 5 |
richardd14 sharesThis market will resolve to "Yes" if "Philadelphia" 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=pennsylvania. To get to the figures used to resolve this market, select the "Historical Air Quality" tab, then find the finalized figure in the "Philadelphia" 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.
Sources: Polymarket's Gamma API, its CLOB price history and its Data API, read every two minutes. Prices are each outcome's Yes price, which is the market's probability: 0¢ for July 18 means the market gives it about 0%.