Prediction Markets Are Sneaking Into US Stocks — And Regulators Are Watching

Belgium Remembers 1944-1945, Tweede Wereldoorlog België, 75 Jaar Bevrijding Expert · 2026-09-28

Remember when prediction markets were just a quirky corner of the internet where people bet on elections and Oscar winners? Those days are fading fast. Platforms like Kalshi and Polymarket have quietly started offering contracts tied to US stock prices, and that's making a lot of people in Washington nervous. ### How Did We Get Here? Prediction markets let you trade on the outcome of future events. Think: "Will the S&P 500 close above 5,000 on Friday?" or "Will Tesla stock hit $300 by year-end?" It's like betting, but wrapped in the language of financial derivatives. For years, these platforms stayed in a gray zone, mostly focusing on politics and sports. Then they realized something: people really want to bet on stocks. Kalshi, a CFTC-regulated exchange, launched event contracts tied to major indices. Polymarket, which operates on crypto rails, followed suit with similar offerings. The pitch is simple: give retail traders a new way to express market views without buying actual shares. ### Why Regulators Are Raising Eyebrows The problem? US securities laws are strict about what counts as a "security." If a contract's value depends on a stock price, the SEC might argue it's a security — and that means registration, disclosure, and a whole lot of red tape. "We're seeing products that look and feel like derivatives, but they're being marketed as event contracts," one former SEC official told me. "That's a recipe for confusion." Here's what's got regulators spooked: - **Investor protection gaps**: Prediction markets don't always have the same safeguards as traditional brokerages. - **Manipulation risk**: Thinly traded contracts can be pushed around by bad actors. - **Jurisdictional turf wars**: The CFTC oversees event contracts, but the SEC oversees securities. Who wins? ### The Insider Trading Question This is where things get really interesting. Prediction markets are fertile ground for insider trading. Imagine you work at a company about to announce a merger. You know the stock will pop. You can't buy shares without disclosing — but can you buy a prediction market contract? Right now, the rules are murky. > "Prediction markets are a loophole waiting to be closed," says a compliance attorney I spoke with. "If you have material nonpublic information, trading on it is illegal — period. But proving it in a prediction market context is a nightmare." The CFTC has brought cases against individuals who bet on events they had inside knowledge of. But those were mostly political or sports events. Stocks are a different beast. ### What This Means for Traders Like You If you're a retail trader, prediction markets offer a shiny new toy. But they also come with real risks: - **Regulatory whiplash**: A contract available today could be banned tomorrow. - **Liquidity issues**: Some markets are thin, meaning wide spreads and slippage. - **Tax headaches**: The IRS hasn't issued clear guidance on how to report prediction market gains. That said, the genie isn't going back in the bottle. Platforms are pushing forward, and regulators are playing catch-up. The next year will likely bring lawsuits, new rules, and maybe even a Supreme Court case. ### The Bottom Line Prediction markets are trying to become the next big thing in finance. They might succeed — or they might get slapped down. Either way, if you're trading stocks, you should pay attention. Because the line between "event contract" and "security" is about to get a lot blurrier.