Prediction markets are having a moment. Kalshi, the leading U.S. prediction market exchange, recently raised $1 billion at a $22 billion valuation. Polymarket processes over $20 billion in monthly trading volume. CNBC and CNN have signed deals to broadcast prediction market data alongside traditional stock tickers. And the regulatory environment has shifted meaningfully, with the CFTC moving away from its earlier adversarial posture and federal policy appearing broadly supportive of prediction market development.
If you’ve been hearing about prediction markets but haven’t taken a serious look, this is your starting point. Here’s what they are, how they work, and why they matter for investors.
The Basic Mechanics
A prediction market is an exchange where you trade contracts on the outcomes of real-world events. Will the Fed cut interest rates at the next meeting? Will a specific bill pass Congress? Will inflation be above or below 3% next quarter?
Each contract trades between $0.00 and $1.00. If the event happens, the contract settles at $1.00. If it doesn’t, it settles at $0.00. The current trading price represents the market’s collective estimate of the probability that the event will occur.
If a contract is trading at $0.65, the market is pricing in a 65% probability. You can buy the contract at $0.65 and collect $1.00 if you’re right, or lose your $0.65 if you’re wrong. You can also sell the contract—effectively taking the other side—at whatever price the market offers.
Every contract has a Yes and a No side, and the prices always sum to $1.00. Buying Yes at $0.75 is economically identical to selling No at $0.25. If you trade options, this will feel familiar: it’s the same relationship as being long a call and short a put at the same strike. While each exchange has its own way of presenting and custodying positions, the user experience across the board simplifies to buying and selling Yes or No contracts.
That’s the entire structure. No complex derivatives math, no strike prices, no expiration chains. One event, one price, one outcome.
Are they options? Absolutely. They’re binary options. Or, if you’re trying to outrun the negative connotations of that term, you might call them “outcome-related options” (OROs).
If you trade options, the structural parallels run deep. See our companion piece: Binary Contracts vs. Puts and Calls
Why the Price Is the Probability
The elegant thing about prediction markets is that the price is doing double duty. A contract trading at $0.72 is simultaneously telling you two things: the cost to buy the contract is 72 cents, and the market’s implied probability of the event occurring is 72%.
This makes prediction markets one of the most transparent instruments in finance. When you look at a stock price, you’re seeing the market’s assessment of a company’s future cash flows, discounted back to today, filtered through dozens of assumptions about growth rates, risk premiums, and macroeconomic conditions. When you look at a prediction market price, you’re reading a probability estimate. Full stop.
This transparency is why prediction markets have become newsworthy. During elections, financial crises, and major policy decisions, prediction market prices provide a real-time, money-backed consensus estimate of what’s going to happen. They have frequently outperformed polls, pundit predictions, and model-based forecasts, making them one of the more reliable forecasting tools available.
How Prediction Market Exchanges Work
Prediction market exchanges operate as peer-to-peer matching platforms, similar in structure to traditional exchanges like the CBOE or CME. When you buy a contract, you’re matched with another participant willing to sell at that price. The exchange facilitates the match and handles settlement. This is fundamentally different from offshore binary options brokers, where you’re trading against the house. On Kalshi and Polymarket, you’re trading against other market participants, and the exchange is a neutral intermediary.
Where the Action Is
Prediction markets trade on several exchanges. The two dominant platforms are Kalshi and Polymarket, each with a distinct approach.
Kalshi
Kalshi is the only CFTC-regulated prediction market exchange in the United States. It operates like a traditional exchange with an order book, supports FIX protocol for institutional traders, and has integrated with brokerages including Robinhood. You fund your account with U.S. dollars via bank transfer or debit card, and you buy and sell contracts denominated in cents. For investors coming from traditional finance, Kalshi offers the most familiar experience.
Polymarket
Polymarket is the largest prediction market by total volume. It’s built on blockchain infrastructure and settles in USDC, a stablecoin pegged to the U.S. dollar. Your positions are represented as tokens rather than contracts, but the trading experience is functionally identical. Holding a “Yes” token at $0.65 on Polymarket means the same thing as a “Yes” contract at $0.65 on Kalshi. Polymarket has the deepest liquidity for political and economic events and recently received CFTC approval for U.S. operations.
There are also smaller exchanges that specialize in specific domains. PredictIt, for example, focuses on U.S. political events and has a dedicated community of political forecasters. But for breadth and depth of markets, Kalshi and Polymarket are where most of the activity is.
Exchanges operating in the US comply with standard “know your customer” (KYC) rules, so the experience is what you’d experience with any US brokerage.
What Can You Trade?
The range of available markets has expanded dramatically. Today you can trade contracts on:
- Federal Reserve policy: Rate decisions, inflation targets, employment data.
- Elections and politics: Presidential, congressional, gubernatorial races, Supreme Court decisions.
- Economic indicators: GDP growth, CPI readings, unemployment figures.
- Geopolitical events: Trade agreements, diplomatic milestones, international policy decisions.
- Regulatory outcomes: Agency rulings, legislation passage, regulatory approvals.
- Non-finance events: Sports, entertainment, and just about anything else.
The breadth of available markets continues to grow as the exchanges compete for volume and institutional interest increases.
Markets are organized into different types of events depending on whether there are one or more markets for the topic, whether those markets are mutually exclusive, whether their outcomes accumulate based on lower strikes, etc.
Learn more about prediction event types: Binary Contracts vs. Puts and Calls. For how cumulative thresholds enable spread and condor-like strategies: Income Strategies in Prediction Markets: What Works Today and What’s Coming
Not Gambling—Something Different
If prediction markets sound like gambling, you’re not alone. It’s the most common first reaction. But the comparison misses something fundamental about what these instruments actually are and how they function in a portfolio.
We address this question head-on in: Are Prediction Markets Gambling? Why the Framing Is Backwards
Why Prediction Markets Matter for Investors
Beyond the trading opportunity itself, prediction markets provide something that didn’t previously exist: a direct, transparent way to express a view on a specific real-world event.
Consider the alternative. If you believe the Fed will hold rates steady at the next meeting, your traditional options are all indirect. You could trade Treasury futures, take positions in interest rate-sensitive bank stocks, or construct a bond ETF portfolio. Every one of these approaches carries exposure to factors beyond the rate decision itself: credit risk, equity market beta, duration, liquidity conditions, and a host of other factors. You wanted to invest in a rate view and ended up with a portfolio sensitive to everything else in the market. We largely built Quantcha around helping investors understand and manage the wide multitude of risks associated with option strategies expressing a narrow view.
A prediction market contract on the actual Fed decision strips away all of that noise. You buy the contract at its current price, and the potential return is transparent and immediate. For event-driven investing—which represents a significant and growing portion of market activity—this is a fundamentally more efficient instrument.
For a worked example with real numbers, see: The $100 Fed Rate Trade
An Evolving Market
Prediction markets today are powerful, but they’re also still maturing. The exchanges are actively building new capabilities. One of the most impactful evolutions in prediction markets will be the adoption of scalar markets that enable scaled payouts mapping to vertical call spread payouts. This will enable contracts across continuous outcome ranges, richer contract offerings across recurring economic themes, and institutional-grade infrastructure for professional traders.
For a deeper look at where the industry is headed: What Prediction Markets Still Need: An Options Trader’s Wishlist
The trajectory is clear, and the pace of development is accelerating. Understanding prediction markets now, while the market is still early and the analytical edge of sophisticated participants is at its greatest, is the smart play.
How to Get Started
If you’re ready to explore prediction markets, here’s a practical starting path.
Start by watching. Pick a few markets on Kalshi or Polymarket that relate to events you follow. Track Fed decisions, economic data releases, political outcomes. Watch how the contracts trade in the days and hours before resolution. You’ll quickly develop intuition for how these markets behave.
Make a small trade. You can buy your first Kalshi contract for less than a dollar. Place a trade on something you have a view on and observe how it feels. The mechanics are simple, but having real money at stake sharpens your attention.
Think across platforms. The same event can be priced differently on Kalshi and Polymarket because they have separate liquidity pools and user bases. Comparing prices across exchanges gives you a more complete picture of market sentiment. But don’t get too distracted by the hype around exchange arbitrage. If the markets are trading at a noticeably different price for any extended period, there is surely a good reason.
Use proper tools. The native platform interfaces are fine for placing simple trades, but if you want to compare markets across exchanges, track multiple positions, or analyze pricing in depth, purpose-built tools make a significant difference. Qwidgets for Prediction Markets aggregates data from Kalshi, Polymarket, and other exchanges into a single view, with integrated Kalshi trading and shareable analysis workspaces. And it’s free.
Try Qwidgets for Prediction Markets at predictions.qwidgets.com—free cross-platform data, integrated trading, and shareable workspaces for serious prediction market participants.
