TOTAL VOLUME:
$134.2b
24H VOL:
$134,145,987
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,441,166,947
406,422
Markets across
30,383
events
MATCHED EVENTS:
2,688
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 9, 4:00 PM EST
Kalshi
This set of markets tracks potential future performance of a major stock market index on a specific date. Each market represents a different threshold value that the index might surpass or not by the close of trading on that day.
All markets share identical resolution mechanics and timelines. Each market resolves to 'Yes' if the closing value of the S&P 500 index on September 09, 2026 exceeds a specific threshold defined in the market's primary rule. Thresholds vary sequentially across markets, each set at increments of five points above the previous level. All markets close on September 09, 2026, and expiration occurs at the earlier of the official index data release or one week following that date. The Exchange has applied standardized modifications to source agency and underlying definitions for all index-based markets as per the Kalshi Rulebook.