Polymarket$3.11BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$391.73MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$25.08MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.
Updated Today
If there is at least an earthquake of 8.0 magnitude with an epicenter in California or its territorial waters before Dec 31, 2028, then the market resolves to Yes.
As of March 18, 2026, the Kalshi odds for Will there be an at least 8.0 magnitude earthquake in California before 2028? are: Before 2028: 9%. These probabilities are derived from real-money trading and update in real time.
Will there be an at least 8.0 magnitude earthquake in California before 2028? 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.
