TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Apr 21, 7:00 PM EST
Kalshi
This event group comprises 13 linked binary markets asking whether SPY (S&P 500 ETF) will close above various price thresholds ($680–$730 in $5 increments) on April 21, 2026. Each market resolves independently based on the official closing price for that single trading day, creating a price-ladder structure where outcomes are mutually exclusive and hierarchically ordered.