What Are Prediction Markets? How Crypto Is Reshaping Event Trading

What Are Prediction Markets?

Prediction markets are platforms where participants buy and sell contracts tied to the outcomes of real-world events. Rather than placing a traditional bet, users trade shares that pay out based on whether a specified outcome occurs. If you believe an event will happen, you buy "Yes" shares. If you believe it will not, you buy "No" shares. When the event resolves, the correct side pays out at $1 per share, while the incorrect side expires worthless.

The concept is not new. Prediction markets have existed in various forms for decades, with the Iowa Electronic Markets running since 1988 for political forecasting. What has changed is the infrastructure. Blockchain-based prediction markets operate on decentralized protocols, enabling global participation, transparent settlement, and 24/7 trading without the limitations of traditional financial intermediaries.

The sector has experienced explosive growth. Polymarket, the largest crypto-native prediction market, recorded $25.7 billion in monthly trading volume in March 2026 with over 1.29 million active wallets. Kalshi, the leading U.S.-regulated platform, controls approximately 89% of the domestic prediction market and reached a $22 billion valuation. Combined, prediction market platforms processed over $21 billion in monthly volume through early 2026, a figure that has grown from roughly $1.2 billion per month in 2025, representing a seventeen-fold increase in just over a year.

How Prediction Markets Work

The mechanics of prediction markets center on binary outcome contracts. Each market poses a question with a defined resolution criteria: "Will Bitcoin exceed $100,000 by December 31, 2026?" or "Will the Federal Reserve cut rates at its June meeting?" Shares trade between $0.01 and $0.99, with the price reflecting the market's implied probability of the event occurring.

If "Yes" shares for a Bitcoin $100K question trade at $0.35, the market collectively estimates a 35% probability that Bitcoin will reach that price by the specified date. As new information emerges, participants buy and sell shares, causing the price to adjust in real time. This price discovery mechanism aggregates the views of thousands of participants into a single probability estimate.

On Polymarket, markets are settled using UMA's Optimistic Oracle, which resolves outcomes based on real-world data with a dispute mechanism to handle contested results. Users deposit USDC to trade, and settlements occur automatically when the event resolves. The entire process runs on the Polygon blockchain, providing low transaction costs and fast execution.

Kalshi operates under a different model as a CFTC-regulated Designated Contract Market (DCM). Its contracts are legally classified as event contracts under U.S. commodity law, providing regulatory clarity but also imposing compliance requirements that limit certain market types. Users trade with U.S. dollars through traditional payment rails, and the platform handles custody and settlement within its regulated infrastructure.

What People Are Trading

Prediction market activity in 2026 spans three dominant categories, each attracting distinct participant profiles.

Sports. Sports markets account for approximately 39% of Polymarket's activity and over 90% of Kalshi's volume. These markets cover outcomes ranging from individual game results to season-long championship predictions. The appeal is immediacy and frequency: sporting events resolve daily, creating a continuous flow of trading opportunities. NFL-related contracts alone generated $3 billion to $5 billion in volume on Kalshi during the most recent season.

Politics. Political markets represent roughly 34% of Polymarket's volume and have been the platform's signature category since the 2024 U.S. presidential election, when Polymarket's odds became a widely cited real-time indicator alongside traditional polling. In 2026, markets cover elections, legislation, central bank decisions, and geopolitical events. The CLARITY Act's progress through Congress, Federal Reserve rate decisions, and international policy developments have all attracted substantial trading interest.

Crypto and Finance. Crypto-related markets account for approximately 18% of Polymarket's activity. These include price milestones (will BTC hit $100K?), protocol events (will Ethereum implement a specific upgrade?), and regulatory outcomes (will the SEC approve a specific ETF?). For crypto market participants, these contracts offer a way to express directional views on industry-specific events that traditional derivatives cannot easily capture.

The median bet size across all categories is $10, with an average of $89. Over 57% of users trade less than $100, and more than 80% trade less than $500, indicating that the market is driven primarily by retail participation rather than institutional capital.

The Convergence With Derivatives

The most significant development in prediction markets in 2026 is their expansion into perpetual futures, blurring the line between event-based trading and traditional derivatives.

In April 2026, Polymarket launched 24/7 perpetual futures trading for crypto, stocks, and commodities. These contracts allow users to take leveraged positions on assets like Bitcoin, Nvidia stock, and gold without expiration dates. The product is powered by Pyth Pro price feeds and operates under Polymarket's newly acquired status as a U.S.-regulated Designated Contract Market.

This move targets a massive addressable market. Bitcoin perpetual futures alone generate over $50 billion in daily volume globally, and adding equities, commodities, and foreign exchange multiplies the opportunity further. By combining event-based prediction markets with continuous derivatives trading, platforms like Polymarket are positioning themselves as comprehensive trading venues that compete directly with both traditional exchanges and crypto-native derivatives platforms.

Kalshi has announced similar plans, reflecting a broader industry convergence where prediction markets, derivatives exchanges, and decentralized trading platforms are building overlapping products that serve increasingly similar user bases.

Why Prediction Markets Matter

Beyond their function as trading venues, prediction markets serve several broader purposes that give them significance beyond entertainment.

Information Aggregation. Prediction markets aggregate dispersed information into probability estimates that often outperform expert forecasts and traditional polling. When thousands of participants with diverse information sources and perspectives trade on an outcome, the resulting price reflects a weighted consensus that incorporates knowledge that no single analyst could possess. Academic research consistently shows that prediction market prices are well-calibrated probabilistic forecasts.

Price Discovery for Non-Financial Events. Traditional financial markets provide price discovery for assets, but they cannot easily price the probability of non-financial events. Prediction markets fill this gap. The probability of a specific piece of legislation passing, a geopolitical event occurring, or a technology milestone being reached can all be priced in real time through prediction market contracts.

Hedging. Businesses and individuals affected by specific event outcomes can use prediction markets to hedge their exposure. A company whose revenue depends on a favorable regulatory outcome could buy contracts that pay out if the regulation fails, offsetting potential losses. While this use case is still nascent, it represents a significant long-term application.

Transparency. On-chain prediction markets provide a level of transparency that traditional betting markets do not. All trades, positions, and settlements are recorded on a public blockchain. This transparency allows participants to verify market integrity and helps regulators monitor for manipulation. On-chain metrics associated with prediction market activity provide real-time insight into how participants are positioning around upcoming events.

Risks and Considerations

Prediction markets carry meaningful risks that participants should understand.

Liquidity and Slippage. While major markets on Polymarket and Kalshi are deeply liquid, smaller or more niche markets can have thin order books. Trading large positions in illiquid markets results in significant price impact, similar to the spread and slippage dynamics observed in less liquid trading pairs on decentralized exchanges.

Resolution Risk. Markets depend on accurate and timely resolution. Ambiguous event definitions, disputed outcomes, or oracle failures can delay or complicate settlement. Polymarket's UMA Oracle includes a dispute mechanism, but contested resolutions have occurred and can temporarily lock funds.

Regulatory Risk. The regulatory landscape for prediction markets remains in flux. While Kalshi operates under CFTC oversight and Polymarket has obtained DCM status, Democratic lawmakers have urged the CFTC to impose tighter restrictions on prediction markets, particularly around sports-related contracts that critics argue constitute gambling rather than financial trading. The classification of prediction market contracts, whether as regulated event contracts, securities, or gambling products, varies by jurisdiction and continues to evolve.

Market Manipulation. Despite the transparency of on-chain markets, prediction markets are not immune to manipulation. Large participants can temporarily move prices by placing substantial orders, potentially distorting the implied probabilities that other participants rely on. Markets with lower liquidity are more susceptible to this risk.

Profitability. Data shows that most prediction market traders do not generate consistent profits. A CNBC report noted that Gen Z and millennials are increasingly participating in prediction markets despite the difficulty of generating returns, drawn by the engagement and entertainment value rather than systematic edge. Participants should approach prediction market trading with realistic expectations about the difficulty of consistently profitable event forecasting.

The Road Ahead

Prediction markets in 2026 sit at an inflection point. Monthly volumes have grown from $1.2 billion to over $21 billion in just over a year. The convergence with perpetual futures is expanding the addressable market by orders of magnitude. Regulatory frameworks are taking shape, with the CFTC providing oversight for U.S. platforms while global markets operate with varying degrees of regulation.

The key question for the sector is whether prediction markets will be classified primarily as financial instruments, gambling products, or something entirely new. The answer will determine the regulatory requirements, institutional participation levels, and long-term growth trajectory of the industry.

For participants, prediction markets offer a fundamentally new way to express views on real-world events and manage exposure to outcomes that traditional financial instruments cannot easily address. Understanding the mechanics, the risks, and the regulatory context is essential for informed participation in a market that is growing faster than almost any other segment in crypto.