TOTAL VOLUME:
$154.4b
24H VOL:
$230,589,906
24H TRANSACTIONS:
2,984,028,936
OPEN INTEREST:
$1,885,293,300
410,482
Markets across
40,213
events
MATCHED EVENTS:
4,340
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 23, 4:00 PM EST
Kalshi
This set of markets allows participants to speculate on the performance of a major stock market index at a specific future date. By dividing possible outcomes into narrow numerical ranges, investors can express precise expectations about market levels without needing to predict an exact value.
All markets in this event resolve based on the closing value of the S&P 500 index on October 23, 2026, at 4pm EDT. Each market corresponds to a specific numerical range, and the market resolves to 'Yes' if the index closes within that range. Markets close on the resolution date and expire either upon data release or one week afterward, whichever occurs first. The Exchange has adjusted source agency and underlying definitions for index markets per the Kalshi Rulebook. This structure creates a comprehensive set of mutually exclusive outcomes covering the entire possible range of index values from below 7,375 up to and including values above 8,074.9999.
Currently, it's difficult to draw direct comparisons between the probabilities reflected in this market and traditional analyst forecasts. While many analysts offer predictions about the S&P 500’s future performance, these are typically point estimates or broad ranges, and often don’t account for the full probability distribution of potential outcomes. This market, however, allows traders to express their beliefs about the likelihood of various price ranges, offering a more nuanced view. It will be interesting to see how the collective wisdom of traders in this market aligns with, or diverges from, expert opinions as we approach Oct 23, 2026.
On Kalshi, this market is priced through a continuous order book, where traders buy and sell contracts representing different S&P 500 price ranges. The price of each contract reflects the market's assessment of 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 bids and asks based on new information and their own analysis, leading to dynamic price discovery. The most actively traded contracts currently suggest a certain level of confidence in specific price levels, but these can change rapidly based on market sentiment and incoming economic data.
This market resolves around Oct 23, 2026, specifically at 4pm EDT on October 23, 2026. The outcome will be determined by the official closing price of the S&P 500 index at that time, as reported by a credible financial data provider. The contract corresponding to the price range that includes the actual S&P 500 price will pay out, while all other contracts will expire worthless. The resolution will be confirmed once the event is verifiable from credible public reporting, ensuring a transparent and objective outcome for this market.
Numerous economic and geopolitical events could significantly impact this market. Major factors include macroeconomic data releases such as inflation reports, interest rate decisions by the Federal Reserve, and employment figures. Unexpected shifts in global economic growth, geopolitical tensions, or significant corporate earnings surprises could also drive substantial price movements. Furthermore, any news related to major companies within the S&P 500, or broader market sentiment shifts, will likely influence trading activity and the prices observed in this market as we approach Oct 23, 2026.