TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 25, 4:00 PM EST
Kalshi
This event tracks the performance of a major stock market index on a specific date, dividing possible outcomes into narrow numerical ranges. Participants can assess where the index will fall by the close of trading, reflecting expectations about economic conditions and market sentiment at that moment.
Each market resolves based on the end-of-day value of the S&P 500 index on September 25, 2026, falling within one of several specified numerical ranges. If the index closes within a market's defined range, that market resolves to Yes; all others resolve to No. All markets close on September 25, 2026, and expiration occurs at the sooner of the first official data release or one week after the close date. The Exchange has modified the Source Agency and Underlying for indices markets per the Kalshi Rulebook.
Currently, it's difficult to draw direct comparisons between the predictions embedded in this market and traditional analyst forecasts. While both attempt to anticipate the future price of the S&P 500, they operate using different methodologies. Analysts typically rely on fundamental and technical analysis, while this market reflects the collective judgment of traders willing to put capital behind their beliefs. It will be interesting to see how the market’s implied probabilities evolve as we approach Sep 25, 2026 and how they align with, or diverge from, expert opinions on the economic outlook.
On Kalshi, this market is priced through a continuous order book, where buyers and sellers submit bids and asks for contracts representing different price ranges for the S&P 500. The price of each contract reflects the probability that the S&P 500 will be within that range at the specified time. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Traders are constantly adjusting their prices based on new information and their own expectations, creating a dynamic and efficient price discovery process. The most actively traded contracts currently indicate the highest probability of the S&P 500 falling within a specific range.
This market resolves around Sep 25, 2026, with the outcome determined by the official closing price of the S&P 500 index at 4pm EDT on that date. The final price will be verified against credible public reporting of the index’s value. Traders who correctly predicted the price range will receive a payout, while those who bet on incorrect ranges will forfeit their stake. The market’s resolution provides a clear and objective assessment of the accuracy of the collective predictions made by traders.
Numerous economic and geopolitical events could significantly impact this market between now and Sep 25, 2026. Major factors include shifts in interest rate policy by the Federal Reserve, unexpected changes in inflation data, and significant geopolitical developments that could disrupt global markets. Corporate earnings reports, particularly from large S&P 500 companies, will also be closely watched. Any news that alters the outlook for economic growth or corporate profitability has the potential to cause substantial price movements in this market.