Prediction markets just acquired their most credible institutional backer yet, and unlike every platform that came before it, this one already owns the plumbing.
Cboe Introduces Prediction Markets Framework for Mini-SPX Contracts
1 April 2026 - 18:10 CEST
Cboe Global Markets will introduce a new prediction market contract on 1 Jun. The Mini-SPX contract will be the first outcome-based product offered by a major exchange under full regulation by the Securities and Exchange Commission (SEC).
The contract, announced on 9 Mar, is based on the XSP Mini-SPX index, a mini version of the S&P 500 Index designed for options trading. It uses a patent-pending payout zone that delivers partial returns when the outcome is close but not exact. This differs from traditional binary contracts that pay all or nothing.
Retail focus drives design
Cboe built the product for its existing retail options users. Retail accounts already make up 52% of SPX 0DTE (zero days to expiry) trading volume. In 2025, 0DTE SPX options averaged 2.3mn contracts daily and made up 59% of total SPX volume.
Joe "JJ" Kinahan, Cboe's senior vice president of alternative investment products, said the behavioural profile of prediction market users closely matches short-duration, directional 0DTE traders - retail investors who place quick, same-day bets on whether the S&P 500 will rise or fall.
"Prediction markets, in my opinion, are the first product that is truly 100% driven by retail," Kinahan said at the Kaiko Agora EthCC side event in Cannes, France.
Regulatory edge over rivals
Unlike Polymarket and Kalshi, which operate under Commodity Futures Trading Commission (CFTC) oversight and have faced state-level enforcement actions, Cboe’s contracts sit inside the established SEC framework for index options. They will be centrally cleared by the Options Clearing Corporation, a US clearing house based in Chicago.
This single jurisdictional choice gives Cboe a structural advantage its rivals cannot match. While competitors navigate CFTC rulemaking and state gaming regulators, Cboe is launching on infrastructure that has been settled for decades.
Brokerage firm Charles Schwab has committed to distributing the product to its clients from day one.
Integration into existing ecosystem
The product is designed to keep retail accounts engaged without destroying them. Kinahan noted that every new product launch faces the same objection: that it will cannibalize existing volume. He said history shows the opposite.
New access points expand the total population of participants rather than draining the old ones. The pattern runs from simple to complex, from defined-risk to structured exposure.
Cboe’s move marks the clearest step yet by a major traditional exchange to bring prediction markets into regulated Wall Street infrastructure. Nasdaq has filed for prediction market binary options and ICE has committed $2bn to Polymarket, but neither can match Cboe’s combination of SEC regulation, central clearing and an already large retail user base.
The launch positions Cboe to capture the same short-term directional traders who already dominate its 0DTE options flow.
