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 28, 3:00 PM EST
Kalshi
This event tracks the performance of a major stock market index at a specific future date and time, allowing participants to speculate on whether the index will surpass certain thresholds. The outcome depends solely on the index's value at the exact closing moment on September 28, 2026, at 3pm EDT.
All markets share identical secondary rules: they close on September 28, 2026, and expire either when the index data is first released or one week after that date, whichever comes first. Each market has a unique primary rule specifying a different threshold value; if the S&P 500 index at the specified time exceeds the respective threshold (e.g., 7549.9999, 7554.9999, etc.), that market resolves to 'Yes.' The Exchange has modified the source agency and underlying for indices markets per the Kalshi Rulebook, but these modifications apply uniformly across all markets in this event.