What is Kalshi and how does it work: Event contracts on a CFTC-regulated exchange

Kalshi is a CFTC-regulated exchange where people trade yes-or-no event contracts priced from $0.01 to $0.99, then settle to $1 or $0 based on the contract’s written terms and Kalshi’s resolution process. The displayed price can be read like a probability, but the trade only pays the way you expect if the market resolves exactly as defined.

Key Takeaways

• Kalshi is a federally regulated U.S. exchange operating as a CFTC Designated Contract Market, a derivatives venue category used by major U.S. exchanges.
• A Kalshi event contract is a YES/NO instrument typically priced from $0.01 to $0.99 that pays $1 if the specified outcome occurs and $0 if it does not.
• You can exit before expiration by selling, but the final payout depends on how the contract is resolved, including the listed Source Agencies and Kalshi’s internal decision process.
• Kalshi’s rulebook allows last-traded-price settlement when an outcome is deemed unresolvable, which is a distinct risk from being “wrong” on the forecast.

Kalshi as an event trading exchange

Kalshi sits in the prediction markets bucket, but it is structured like a U.S. derivatives venue rather than a novelty betting app. The platform operates as a designated contract market under the Commodity Futures Trading Commission, which is the same regulatory category used by large U.S. derivatives exchanges. Kalshi was founded in 2018 by Tarek Mansour and Luana Lopes Lara, and it received CFTC designation for event contracts in November 2020.

The instrument traded on Kalshi is an event contract. It is a contract that resolves to a binary payout based on a real-world question that has to be answerable from the contract’s terms. The contract is not “who feels right,” it is “what does the contract say, what source is used, and what is the exchange’s process for calling it.” That distinction matters more than most Kalshi explained threads admit.

What events can you trade on Kalshi? The exchange lists markets across categories that include economics and finance, politics, sports, culture, and weather. The examples Kalshi itself uses include questions like whether the Federal Reserve will raise rates in a given month or whether a team will win a championship. Election-related contracts became a headline topic after an October 2024 federal appeals court ruling supported their availability on the regulated exchange.

How event contracts are priced

A Kalshi market typically has two sides, YES and NO, and the prices tend to add up to roughly $1. Contracts are usually priced between $0.01 and $0.99. Traders commonly interpret the price as the market-implied probability, so $0.30 on YES reads as about a 30% chance.

The payoff math is the clean part. If a trader buys YES at $0.30 and the event resolves YES, the contract pays $1 and the profit is $0.70 per contract. If it resolves NO, the contract pays $0 and the loss is the $0.30 paid. That is why the displayed price is not just “a probability,” it is also the maximum loss for a held-to-settlement position.

The other screen-level mechanic that matters is that positions can be sold before resolution. That turns the contract into something closer to a short-dated derivative than a one-shot wager. A trader can buy YES at $0.30, see it trade up to $0.55 on new information, and sell to realize gains without waiting for the final call. The flip side is that a trader can be directionally right about the world and still lose money if they pay too much or get shaken out before the market closes.

How Kalshi resolves and settles markets

The lifecycle is straightforward on paper and messy at the edges. DeFi Rate frames the flow as market opens, traders buy and sell YES and NO, the market closes at expiration, a resolution process determines which side won, and settlement transfers funds to winners. The key is that resolution and settlement are separate steps, and the trade’s real dependency is the resolution step.

Kalshi uses a centralized resolution model. Each market’s terms list named Source Agencies, and those terms are filed with the CFTC as part of the exchange’s self-certification process for cftc event contracts. Source Agencies vary by market type, and DeFi Rate lists examples such as government data releases for economic markets and CF Benchmarks indices for certain crypto price markets.

Even with Source Agencies named, the final call sits with Kalshi’s internal markets team. Traders can submit a “Request to Settle” through the interface, but it functions as a prompt rather than a binding action. When an outcome is disputed or ambiguous, DeFi Rate summarizes that Kalshi’s rulebook includes an Outcome Review Committee that can make binding determinations.

Settlement is the payment step after resolution. DeFi Rate reports that on Kalshi, settlement typically occurs within a few hours after the resolution is determined. That speed is a feature for anyone who wants the position off the books quickly, but it also means disputes are about the decision itself, not about waiting for an oracle window to finish.

The edge case traders need to understand is Rule 6.3(c). DeFi Rate reports Kalshi can settle a market at the last traded price if the outcome is deemed unresolvable. In February 2026, a Super Bowl halftime market became the reference example. Kalshi invoked Rule 6.3(c) and settled at the last traded price, while polymarket resolved the similar question as a full YES payout. Same broadcast footage, different settlement outcome, because the settlement process is part of the product.

How Kalshi differs from sportsbooks

The cleanest distinction is counterparty structure. A sportsbook sets odds and takes the other side, then manages risk with a margin embedded in the line. Kalshi positions itself as an exchange where users trade with each other, and it says it does not take a position on event outcomes. That changes what “fairness” means. The main worry is not the house shading a number, it is whether the contract is written and resolved in a way that matches how traders think it will be graded.

Regulation is the second distinction that drives behavior. Sportsbooks are typically regulated at the state level under gambling frameworks. Kalshi operates under federal derivatives regulation as a designated contract market. That is why the question “is Kalshi a real exchange” has a concrete answer. It is a regulated derivatives venue, not a grey-market app.

Contract design is where the two worlds collide. Sports betting markets are usually outcome-driven and standardized. Kalshi markets are event-driven and can be narrowly specified, which is powerful but creates interpretation risk. If the question is tight and the data source is clean, the market trades like a simple binary. If the question is fuzzy, the trade becomes a bet on how the exchange will interpret the words.

Fees, incentives, and key risks

Kalshi’s stated revenue model is transaction fees on the expected earnings of the contract, and it says it does not take a position on event outcomes. That is structurally closer to an exchange fee model than a sportsbook hold model. It also means the platform’s incentive is tied to volume, which is why promotions matter.

One explicit incentive is the Kalshi Volume Incentive Program. Kalshi describes it as a cashback-style rewards system based on eligible trading volume, with listed dates from September 15, 2025 to September 1, 2026, and it notes the program can be modified or ended at any time. The Help Center also lists eligibility exclusions, including affiliates and employees, certain intermediaries such as FCMs and IBs and their customers, and international non-U.S. users. Eligible trades include contracts priced between $0.03 and $0.97 during active reward periods, with rewards capped at $0.005 per contract traded.

The risk beginners miss is not volatility, it is resolution risk. DeFi Rate documents multiple incidents where centralized determination and edge-case handling became the whole story, including an NFL season win totals misgrading in January 2026 that was later reversed after public attention. The same analysis highlights that Kalshi’s rulebook allows last-traded-price settlement when an outcome is deemed unresolvable, which can produce a payout that looks nothing like the $1-or-$0 mental model.

Three misconceptions show up repeatedly. First, “it’s just betting” misses the exchange structure and the fact that the contract is a derivative-like instrument with a defined settlement process. Second, “price equals true probability” ignores liquidity and positioning, but also ignores that the probability is conditional on the contract’s exact wording and data source. Third, “settlement is automatic and objective” is wrong on its face for centralized resolution, because a human process decides whether the resolution criteria have been met.

Near the top, this was framed as prediction markets. Near the bottom, it is worth restating the category as event-risk trading: the product is not only the payout curve, it is the rulebook that decides what happened.

The Take

I’ve watched traders treat a Kalshi screen like it’s a clean probability feed and then get blindsided by the boring part: who gets to say what happened. DeFi Rate’s February 2026 Super Bowl halftime example is the one that should stick. Kalshi invoked Rule 6.3(c) and settled at the last traded price, while Polymarket paid YES at $1 on what looked like the same question. That is not a pricing lesson. That is a settlement-process lesson.

If someone wants to understand Kalshi, the right mental model is “a $1-or-$0 derivative with a written spec.” The trade is not just whether the world does a thing. It is whether the contract’s Source Agency, timing window, and Kalshi’s internal resolution call will map cleanly onto the thing the trader thinks they bought. I’ve seen more money lost to sloppy reading than to bad forecasting.

Sources

• news.kalshi.com
• DeFi Rate
• Kalshi Help Center
• Kalshi Help Center