Updated November 2026. Prediction markets are regulated exchanges where traders buy and sell contracts that pay out based on the outcome of real-world events. A contract on “Will the Fed cut rates in December?” trades between zero and one dollar, and settles at one dollar if the answer is yes and zero if the answer is no. The live price is the market’s probability. If the contract trades at 71 cents, the market is pricing a 71% chance of a cut.
That simple structure has become one of the most reliable forecasting tools in modern finance. In 2026, prediction markets are routinely cited by the Federal Reserve, Wall Street research desks, political campaigns, and sports books because their crowd-sourced probabilities tend to outperform polls, models, and expert pundits. This guide covers what prediction markets are, how they work, which platforms are legal in the US, and how to start trading them.
How Prediction Markets Work
Every prediction market contract is binary: it resolves to either Yes or No. Traders buy Yes shares if they think the event will happen and No shares if they think it will not. Shares trade continuously between zero and one dollar. The order book sets the price. When the event resolves, the winning side pays one dollar per share and the losing side pays zero.
Because prices are bounded between zero and one, they translate directly into probabilities. A Yes share trading at 42 cents implies the market thinks there is a 42% chance the event occurs. If new information makes the event more likely, buyers push the price up; if it becomes less likely, sellers push it down. That continuous repricing produces a live, dollar-weighted probability estimate that updates every time a trade clears.
Unlike sports betting, there is no house taking the other side of your trade. Prediction markets are exchanges: you trade against other participants, and the platform takes a small fee or spread for matching the order. That structure is why they are regulated as derivatives rather than as gambling in the United States.
The Major Prediction Market Platforms in 2026
Three platforms now account for the vast majority of global prediction market volume. The table below summarizes the key differences for US traders.
| Platform | Regulator | Available To | Settlement | Best For |
|---|---|---|---|---|
| Kalshi | CFTC (US) | US residents in 50 states | USD | Politics, economics, Fed, sports |
| Polymarket | Non-US (returning to US via QCX) | Global; US access through regulated venue | USDC on Polygon | Crypto, international events, deep books |
| PredictIt | CFTC no-action letter (academic) | US residents, capped positions | USD | Small-size political trading |
Kalshi is the largest fully regulated prediction market in the US and the only platform where Americans can legally trade political event contracts under direct CFTC oversight. Polymarket is the largest prediction market globally by volume, with the deepest books on crypto, geopolitics, and sports. In 2026, Polymarket completed its path back into the US through a CFTC-registered derivatives exchange, meaning American traders now have compliant access to its liquidity for the first time since 2022.
For a full breakdown with fees, liquidity, and market coverage, see our updated best prediction markets rankings.
Why Prediction Markets Are More Accurate Than Polls
The accuracy of prediction markets is not a marketing claim. In the 2024 US presidential cycle, Polymarket’s and Kalshi’s final odds matched the actual electoral outcome more closely than every major poll aggregator. Through the 2026 cycle, state-level Senate contracts on Kalshi have tracked within one to two points of final certified margins across the races that have resolved so far.
The reason is incentive structure. A pollster asks a sample what they intend to do. A prediction market asks participants to put money on what they believe will actually happen. When traders are wrong, they lose money, so overconfident or ideologically motivated positions get arbitraged away by sharper participants. Over large numbers of trades, that dynamic produces a probability-weighted consensus that is unusually hard to beat.
Economists call this the “wisdom of crowds” effect, but with a crucial filter: only informed participants with capital at risk have meaningful influence on the price. That filter is what distinguishes a prediction market from a social media poll or a cable news segment.
What Can You Trade on Prediction Markets?
The scope of tradable events has expanded dramatically through 2025 and 2026. Current categories include:
- Politics: Election outcomes, Senate and House control, cabinet appointments, impeachment and legislative outcomes
- Economics: Fed rate decisions, CPI prints, GDP growth, recession odds, unemployment rate thresholds
- Sports: Game outcomes, season awards, playoff brackets, championship winners, player prop markets
- Crypto: Bitcoin and Ethereum year-end prices, ETF approvals, protocol upgrades, exchange outcomes
- Geopolitics: Treaty signings, ceasefire outcomes, leadership changes, major policy announcements
- Culture and media: Movie box office, award show winners, streaming records, celebrity events
Kalshi lists more than 1,500 active contracts across these categories in a typical week. Polymarket runs even broader coverage internationally, with more than 2,000 active contracts at any time.
Are Prediction Markets Legal in the US?
Yes, with the key distinction being the regulator. Kalshi operates as a Designated Contract Market under the CFTC, which gives it the same legal footing as other US derivatives exchanges like the CME. That status was reinforced in 2024 and 2025 by federal court rulings that affirmed Kalshi’s right to list political event contracts over objections from the CFTC itself.
Polymarket’s return to US traders in 2026 came through registration of a new US-licensed derivatives venue, bringing it under CFTC oversight for American users while preserving its international order book. The combined effect is that in 2026, US traders have fully legal access to the two largest prediction markets in the world for the first time ever.
State-level sports betting laws are a separate regime and do not apply to CFTC-regulated event contracts. Kalshi has explicitly tested this distinction in court for sports contracts and continues to list them nationwide pending ongoing litigation.
How to Get Started
Opening a prediction market account takes less than ten minutes. You will need a government ID and a US bank account or debit card for Kalshi, or a self-custody crypto wallet funded with USDC for Polymarket. Minimum trade sizes are small, typically one dollar on Kalshi and a few cents on Polymarket. Fees are a fraction of what sports books charge, and winners are paid out in cash rather than in site credit.
Most new traders begin by paper trading or taking small positions on contracts in their areas of actual expertise. The learning curve is steep for a few hours, then flat. Within a week, most traders understand how to read the order book, interpret implied probabilities, and size positions sensibly.
Where to Trade
Both platforms covered in this guide are open to US traders in 2026 and offer sign-up bonuses for new accounts. Sign up for Kalshi for CFTC-regulated US access and the deepest politics, economics, and sports books. Sign up for Polymarket for the largest global liquidity pool, with strongest coverage of crypto, geopolitics, and international events.
For a side-by-side comparison with current fees, liquidity, and market coverage, see our best prediction markets rankings, refreshed weekly.