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    Complete Guide

    How Do Prediction Markets Work?

    The simple version, the detailed version, and everything in between. From pricing mechanics to platform structure and settlement.

    Updated March 2026 · 12 min read

    Prediction markets are not investment advice.

    This page explains how prediction markets work. It is not a recommendation to trade. You can lose money. See our legal disclaimer.

    The 30-Second Version

    A prediction market is a place where you can bet on whether something will happen. You buy a contract that pays $1 if you're right and $0 if you're wrong. The price of the contract (say, 70¢) tells you what the crowd thinks the probability is (70%).

    If you think the probability is higher than the price, you buy. If lower, you sell (or buy "No"). When thousands of people do this with real money, the resulting price tends to be remarkably accurate—often better than polls, pundits, or models.

    That's it. Everything below is details.

    Step by Step: How a Trade Works

    Step 1

    Pick a question about the future

    Prediction markets offer contracts on real-world events: "Will the Fed cut rates in July?" or "Will it snow in NYC on Christmas?" Each contract is a simple Yes/No question with a defined settlement date.

    Step 2

    Buy Yes or No

    If you think the answer is Yes, buy a Yes contract. If No, buy a No contract. The price (0¢ – 99¢) reflects the current crowd estimate of the probability. A Yes at 60¢ means the crowd thinks there's about a 60% chance.

    Step 3

    Watch the price move

    As new information arrives—economic data, news, expert analysis—other traders buy and sell, and the price moves. You can sell your position at any time to lock in a profit or cut a loss, just like selling a stock.

    Step 4

    Settlement: collect or lose

    When the event happens (or the deadline passes), the contract settles. Yes contracts pay $1 if the event occurred, $0 if not. Your profit is $1 minus what you paid. If you bought Yes at 60¢ and it settles Yes, you make 40¢ per contract.

    Worked Example

    The question: "Will the Fed cut rates at the July 2026 meeting?"

    Current price: Yes = 62¢ | No = 38¢

    Your view: You think a cut is more likely than 62%, so you buy 100 Yes contracts at 62¢ each. Cost: $62.

    Possible outcomes

    Scenario A — Fed cutsWins

    Your 100 contracts settle at $1 each = $100. Profit: $38 (61% return).

    Scenario B — No cutLoses

    Your contracts settle at $0. Loss: $62 (your full stake).

    Scenario C — You change your mindExit

    Before settlement, the price rises to 75¢. You sell your 100 contracts at 75¢ = $75. Profit: $13, regardless of the final outcome.

    Why Are They Accurate?

    Prediction markets aggregate information from thousands of participants, each with different knowledge, models, and perspectives. Crucially, each participant is putting real money behind their beliefs—which filters out noise, bluffing, and cheap talk.

    This mechanism is related to the "wisdom of crowds" effect, famously demonstrated by Francis Galton's ox-weight experiment (1907). When you average the independent estimates of many people, the result is often more accurate than any individual expert. Prediction markets supercharge this by weighting estimates by conviction (money) and updating in real time.

    Diverse information

    Thousands of traders with different data, models & expertise

    Skin in the game

    Real money filters out noise and incentivizes accuracy

    Real-time updates

    Prices move instantly as new information becomes available

    Academic research supports this. Research by Wolfers and Zitzewitz ( 2004) found that prediction markets have historically performed comparably to or better than traditional polling in U.S. elections.

    That said, prediction markets are not infallible. They can be wrong—especially on low-liquidity markets or events with true uncertainty. They reflect the crowd's best estimate, not certainty.

    Markets Move Before Headlines

    One reason prediction markets get so much attention is that prices often move before television coverage or official summaries catch up. That can happen because traders process public information quickly, because market participants interpret ambiguous signals differently, or because liquidity is thin enough for a few traders to move price.

    The useful lesson is not that markets are magic. It is that price is a live signal, not a settled fact. A sharp move can reflect genuine new information, speculative crowd behavior, or a temporary liquidity shock.

    • Information aggregation: markets can incorporate public clues faster than traditional writeups.
    • Liquidity effects: thin markets can swing hard on relatively small trades.
    • Verification still matters: a price move is a probability signal, not proof that the underlying claim is true.

    That is why the best way to use a prediction market is as one input among many: read the rules, check the liquidity, compare related markets, and verify the underlying facts.

    The Platform Landscape

    The U.S. prediction market landscape spans multiple exchanges and distribution apps, each with a different approach to regulation, technology, and user experience.

    Kalshi

    CFTC Regulated

    Kalshi is a CFTC-regulated DCM + DCO (Designated Contract Market and Derivatives Clearing Organization)—the most regulated type of prediction market in the U.S. It offers event contracts on economics (CPI, jobs reports), weather, politics, and culture. Available to U.S. residents. Uses a central limit order book.

    U.S. legalUSD depositsKYC requiredMobile & web

    Polymarket

    CFTC Regulated (US)

    Polymarket has two products: Polymarket US (QCX LLC) operates through a CFTC-designated contract market for U.S. users, while the international version operates separately and uses a different market structure. U.S. product details can change as rollout and rule filings evolve, so traders should verify the current app, funding methods, and market categories directly.

    US available via Polymarket US appCard, bank, or USDCKYC required (US)iOS app

    FanDuel Predicts

    CFTC Regulated

    FanDuel Predicts launched December 22, 2025 through FanDuel and CME Group. At launch, it rolled out first in Alabama, Alaska, South Carolina, North Dakota, and South Dakota, with expansion planned after that. It offers sports, financial, and economic event contracts through a standalone app.

    Select U.S. statesUSDID verificationMobile app

    Robinhood

    Kalshi-Powered

    The most accessible entry point for new traders. Robinhood offers Kalshi-powered event contracts directly in the same app where millions already trade stocks and crypto. Curated selection of ~20 featured markets. No new account needed. Not available in NJ, MD, or NV. Coinbase, Webull, and PrizePicks also offer Kalshi-powered contracts through their own apps.

    Kalshi infrastructureUSD depositsExisting accountMobile app

    ForecastEx (Interactive Brokers)

    Institutional

    CFTC DCM + DCO owned by Interactive Brokers. The institutional option — prediction markets alongside stocks, options, and futures in the same IBKR brokerage account. Covers economics, politics, and finance. No sports. Best suited for experienced traders who want prediction markets integrated into a professional trading workflow.

    IBKR account requiredUSDNo sportsAPI access (TWS)

    Settlement & Transparency

    How markets determine the final outcome—and pay out winners—varies by platform. Transparency is critical: traders need to trust that settlement is fair and based on objective criteria.

    PlatformSettlement MethodResolution SourceDispute Process
    KalshiCentralized, compliance teamOfficial data (BLS, NOAA, AP, etc.)Internal review; CFTC oversight
    Polymarket USCentralized, Markets TeamOfficial data sourcesInternal review; CFTC oversight
    Polymarket IntlUMA optimistic oracleProposed by UMA tokenholdersOn-chain dispute with bond
    FanDuel PredictsCentralized platform operatorOfficial stats & resultsInternal support process

    Settlement disputes are rare but can be contentious. In 2025, several Polymarket contracts triggered UMA disputes, including politically sensitive markets where the "correct" resolution was ambiguous. We track major settlement events on our Insights page.

    Regulation & Legal Status

    The regulatory landscape for prediction markets in the U.S. is complex and evolving rapidly. Here's the current state as of early 2026:

    • CFTC jurisdiction: The Commodity Futures Trading Commission regulates "event contracts" under the Commodity Exchange Act. Kalshi operates as a DCM under CFTC oversight.
    • Congressional elections ruling: In 2024, a federal court ruled that the CFTC could not block Kalshi from offering election contracts, a landmark decision. The CFTC has since proposed new rules for political event contracts.
    • Polymarket's CFTC settlement: In January 2022, Polymarket paid $1.4M to settle CFTC charges for operating an unregistered trading facility and previously geoblocked U.S. users. It relaunched for U.S. users in December 2025 (invite-only, sports markets only; other categories coming soon) via QCX LLC (CFTC-regulated DCM).
    • State-level disputes: Even with federal derivatives regulation, some sports-related event contracts have faced state-level challenges and litigation over whether they conflict with state gambling law.
    • Proposed legislation: Several bills have been introduced in Congress to create clearer frameworks for prediction markets, though none have passed as of this writing.

    For the latest, see our Regulatory Status page, updated regularly.

    Ready to explore prediction markets?

    Browse live markets across Kalshi, Polymarket, and PredictIt. Compare prices, track trends, and see where the crowd thinks the world is headed.