S&P 500 monthly O/U

As of March 30, 2026, the Polymarket odds for S&P 500 monthly O/U are: >$6,500: 23%, >$6,600: 10%, >$6,900: 1%. These probabilities are derived from real-money trading and update in real time.

S&P 500 monthly O/U is currently available on Polymarket. 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.