Key Takeaways Prediction market pioneer Kalshi’s estimated ARR reached $4 billion as of August 2026, amid a funding round valuing the company at roughly $40 billion . 1 Bernstein forecasts annual prediction market trading volume could approach $10 trillion by 2035, over 20x its estimated 2026 level. 2 Investors can gain exposure to Kalshi through private transactions, closed-end funds, and ETFs .