TOTAL VOLUME:
$154.4b
24H VOL:
$235,918,089
24H TRANSACTIONS:
2,984,028,936
OPEN INTEREST:
$1,884,820,873
413,109
Markets across
40,428
events
MATCHED EVENTS:
4,364
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 22, 4:00 PM EST
Kalshi
This set of markets tracks the performance of a major stock market index on a specific date, resolving based on whether the index closes above various threshold values. Each market represents a different price level, allowing participants to speculate on the exact magnitude of the index's performance at the close of trading on that day.
All markets in this event resolve based on the end-of-day value of the S&P 500 index on October 22, 2026, at 4pm EDT. Each individual market has a specific threshold value; if the index closes above that threshold (rounded down to four decimal places), the market resolves to 'Yes.' Markets close on October 22, 2026, and expiration occurs at the sooner of the first official release of the index data or one week after the close date. All markets follow the same closing and expiration mechanics, with consistent data sourcing adjustments as specified in the Exchange's rulebook for index markets.