Polymarket$3.30BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$381.46MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$27.64MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.
Updated Today
If the S&P 500 index value on Dec 31, 2026 at 4pm EST is above 6845.50, then the market resolves to Yes.
As of March 18, 2026, the Kalshi odds for Will the S&P 500 be above 6845.5 on Dec 31, 2026 at 4pm EST? are: Positive Growth: 54%. These probabilities are derived from real-money trading and update in real time.
Will the S&P 500 be above 6845.5 on Dec 31, 2026 at 4pm EST? is currently available on Kalshi. Check PredictMarketCap for cross-platform availability as new markets are added regularly.
Prediction market odds reflect the aggregate opinion of traders who risk real money on outcomes. The price of a share (e.g., 65¢) represents the market's implied probability (65%). Prices move as traders buy and sell based on new information, polls, and analysis.
