TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 21, 2:00 PM EST
Kalshi
This set of markets focuses on predicting the performance of a major stock market index at a specific future date and time. Each market represents a different threshold value that the index must exceed to settle as 'Yes'. The outcome depends entirely on the index's level at the exact closing moment specified.
All markets share identical secondary rules and resolution mechanics. Each market resolves to 'Yes' only if the S&P 500 index value at exactly 2pm EDT on September 21, 2026 exceeds its specific threshold (e.g., 7474.9999 or higher for the first market). The markets close on September 21, 2026, and expiration occurs either when the index value is officially released or one week after the closing date, whichever comes first. The Exchange has applied specific modifications to the source agency and underlying assets for all index-based markets as noted in the Kalshi Rulebook.