TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 15, 4:00 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 resolve positively. These markets allow participants to speculate on the future direction of market growth.
All markets resolve based on the end-of-day value of the S&P 500 index on September 15, 2026, at 4pm EDT. Each individual market has a specific threshold value; if the index closes above that threshold, the market resolves to 'Yes,' otherwise to 'No.' Markets close on September 15, 2026, and expiration occurs at the sooner of the first official data release or one week after that date. All markets adhere to modified source agency and underlying rules for indices as specified in the Kalshi Rulebook.