Yes, Kalshi lists Major League Baseball home run markets: a per-player, per-game event contract that settles at $1 if the named hitter homers in that game and $0 if he does not. They live under the ticker family KXMLBHR, and you can take either side while the market is open. If you have traded other Kalshi event contracts, the familiar part is the $1-or-$0 settlement; the new part is applying that structure to one hitter in one MLB game. What this page adds is the part most home run pages never touch: the exit move an exchange gives you that no sportsbook ticket will, and an honest answer, measured on our own board rather than asserted, to whether the prices beat the books.
The Quick Answer
Kalshi home run markets are per-player, per-game event contracts under the ticker family KXMLBHR, settling at $1 on a home run and $0 without one; the price is the market's implied probability, and because the contract is two-sided you can place a closing trade before first pitch instead of relying on a sportsbook's discretionary cash-out. On price the exchanges have nothing to brag about: on one full slate, on one night, when we lined up every hitter priced in both places, the exchange price never beat the books' best number. The ticker anatomy, the price-to-probability table, the exit move in practice, and that honest comparison are below.
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What A KXMLBHR Contract Actually Is
Each MLB game Kalshi lists for home run trading gets an event under the KXMLBHR family, with a ticker that encodes the date, the scheduled first pitch and the matchup. A ticker in this family looks like KXMLBHR-26JUL312015TEXHOU: the family name, then the game's date, its scheduled Eastern start time and the two team codes, that one a Rangers-Astros matchup. That specific market has long since settled, so read it as an illustration of the pattern rather than a live listing; today's games use the same construction with today's date. Under each event, every listed hitter gets his own yes-or-no market: will this player hit a home run in this game?
Settlement is as clean as event contracts get. If the hitter homers, yes settles at $1 and no settles at $0. If the game ends without one, the reverse. There is no line to beat and no grading dispute about margins, because the question is binary. The one place to slow down is the market rules page attached to each contract, which governs the awkward cases like postponements and hitters who never enter the game. Read it on Kalshi before you trade, the way you would read the fine print on any event contract.
One base rate frames everything else on this page: home run contracts resolve no far more often than yes. Most hitters, most nights, do not homer. Even the premier power bats in baseball homer in far fewer games than not. Keep that in your head, because it explains both why the yes side is cheap and why the expensive no side behaves the way it does when we get to selling.
The Price Is A Probability
A Kalshi contract trades somewhere between a penny and a dollar, and the price is the market's implied probability. Do the conversion once and you can carry it everywhere: a contract at 25 cents is the market saying that hitter homers in roughly 25% of the ways tonight plays out. Pay 25 cents, and you are risking 25 cents to collect a dollar about one time in four if the market has it right. That conversion is the whole trick. When I see 25 cents, I read "about one in four," and every price on the board becomes a sentence instead of a number.
For readers coming from a sportsbook, the same prices in American odds:
| Kalshi Price (Yes) | Implied probability | Sportsbook equivalent |
|---|---|---|
| 10¢ | ~10% | +900 |
| 20¢ | ~20% | +400 |
| 25¢ | ~25% | +300 |
| 33¢ | ~33% | about +200 |
| 50¢ | ~50% | +100 |
The row I keep coming back to is the 25-cent one. A 25-cent home run contract and a +300 sportsbook prop are the same claim about the world wearing different clothes, and once that translation is automatic, you read a Kalshi board the way you already read a prop menu. The full conversion, both directions, is in our guide to Kalshi odds; the shorthand for this market is simple, cents equal percent. Close enough to trade on, never exactly: you are quoted a bid and an ask a cent or more apart, and both sides carry a little overround, so the yes price and the no price will not sum to a clean dollar.
Two-Sided: The Exit A Sportsbook Ticket Never Gives You
Here is the single biggest practical difference, and in our experience most readers do not know it exists. A sportsbook home run prop is, for practical purposes, final the moment you bet it. Some books offer cash-out on some markets, but cash-out is granted at the book's discretion, at the book's price, on the markets the book chooses, and it can disappear exactly when you want it most. A Kalshi contract is a position, not a ticket. While the market is open, you can sell what you bought into a live order book at a price other traders set, and you can hold either side, because an exchange is not a sportsbook and there is no house deciding what you are allowed to do with your own position.
The honest caveat belongs here rather than in the fine print, because it is the thing that decides whether any of the above is real on a given night: the exit only exists if somebody is on the other side of it. Home run books can be thin, and a thin book means the exit is available in principle and priced badly in practice, with a wide gap between what a buyer will pay and what a seller wants. That is why a limit order at a price you choose will usually treat you better than crossing the spread for an instant fill, on the way in and on the way out. Check the depth before you assume you can leave.
Two-sided also means you can be the seller, and this is where the base rate from earlier comes back. Because most contracts settle no, the no side is expensive and the seller's life looks smooth: sell yes at 20 cents and you collect 20 cents while risking 80, so one homer erases four wins of the same size. Sell at 10 cents and one loss erases nine. Selling an unlikely outcome collects a small premium against most of a dollar. A seller can stack quiet green nights for weeks and hand them all back on one swing, which is why position size is what decides whether the bad night is survivable. That arithmetic gets its own full treatment in our piece on selling long shots; do not sell your first home run contract before reading it.
A Kalshi contract is a position, not a ticket. The price is a probability you can trade against, in either direction, at any point until the market closes. Everything a sportsbook prop makes final at bet time stays a decision here.
A Worked Example: Three Ways Out Of One Contract
Put the pieces together with illustrative prices. The night before a game, you buy yes on a middle-of-the-order bat at 20 cents, which is the market saying roughly 20%. These markets move all day as lineup news, weather and money arrive, so the board as of 9 a.m. can look nothing like the board at first pitch. Each buy and each sell also pays Kalshi's trading fee, which this arithmetic leaves out; the fees guide has the details, read off Kalshi's own terms. Take that seriously here rather than filing it away, because a round trip on a cheap contract is where a fee bites hardest in proportional terms: the 10-cent move below survives it, a one-cent move does not. The exit is worth taking on a real price move, not on noise. From that one entry, three different endings:
- Sell Into Strength. The lineup card posts him cleanup instead of sixth, the wind turns out toward a short porch, and buyers push the market to 30 cents, a 30% claim. You sell before a single pitch and collect 10 cents per contract on a home run that never has to happen.
- Cut The Loss. The opposing starter he crushes gets scratched for a tougher arm, and the price sags to 12 cents, roughly 12%. You sell, take the 8-cent loss, and keep the other 12 cents of your risk instead of riding a fading long shot to settlement.
- Hold To Settlement. He homers and yes settles at $1, an 80-cent profit on the 20-cent entry, less fees. He does not, and the contract expires at $0.
The third ending is the only one a sportsbook offers. The first two are the reason this instrument is interesting.
The Honest Price Comparison
Now the question every sportsbook bettor asks first: are the prices better? We did not have to guess. We track home run prices across the major sportsbooks and the prediction markets on our own board, and when we lined up every hitter priced in both places across a full slate, the comparison was not close. The prediction-market prices we compared beat the best sportsbook price zero times. They tied about 25% of the time and were shorter, meaning they paid less, the other 75%.
So the case for trading home runs on Kalshi is not price, and any page that tells you an exchange offers better odds on home runs is selling you something our own data refutes. The honest case is the venue. Kalshi is a CFTC-regulated exchange operating under a federal framework rather than state-by-state sportsbook licensing, which is why the regulation behind it is real in a way a marketing badge is not. Do not read that as a clean availability advantage, though. Availability is state-specific and it moves, and the sports contracts specifically carry their own restrictions in some states even where the exchange itself operates; how prediction-market legality actually works covers the map, and Kalshi's own eligibility check is the final word before you fund an account. Beyond the regulation, there is no house on the other side of your trade, only another trader, and the platform charges a trading fee instead of building vig into every price. And there is the exit: the two-sided structure above is built into the instrument, so no book can grant it or revoke it, and for a trader who reacts to lineup news and weather, that optionality is real. It never shows up in an odds comparison.
The practical takeaway cuts both ways. If you are shopping only for payout, check the books first: the same market's price varies book to book, and our live odds screen shows how an MLB number scatters across the 20+ sportsbooks we track, a shopping habit that applies to a home run prop as much as a moneyline. That screen is free to browse, and OddsShopper Pro, which layers our paid market tools on top of it, starts with a free 7-day trial if you want to try the full version before paying for anything. If what you want is a regulated venue where you can still manage a position after you take it, that is what Kalshi actually offers.
For the category-wide view — how home run contracts trade across exchanges, not just on Kalshi — see our home run prediction markets overview.
Coverage Is Thinner Than A Sportsbook Menu
One more expectation to set before you go looking for your favorite bench bat. A sportsbook home run menu runs deep into each lineup. On the slate we checked, the exchanges did not come close. Kalshi priced roughly a quarter of the hitters our board carried from the sportsbooks, and Polymarket about half. The names that made the exchange lists were the obvious ones, the middle-of-the-order power, and if you show up expecting all nine hitters in every lineup, you will leave disappointed. The two exchanges also differ from each other in what they list, which is one of the real differences we walk through in Kalshi vs Polymarket.
A disclosure belongs right here, next to the comparison rather than buried at the bottom: we have no affiliate or commercial relationship with Kalshi, and we do carry sign-up offers for some other prediction-market and betting platforms, Polymarket among them. Judge our comparisons with that in mind; we wrote this page so it would read fair to someone who knows exactly who pays us.
The season-long race is the deepest contract in the family — our MLB home run leader model verdict scores that board seat by seat.
Kalshi Home Run Markets FAQ
Can you bet home runs on Kalshi? You can trade them, which mostly amounts to the same thing with a different rulebook. Kalshi lists per-player home run contracts under the KXMLBHR family that settle on whether the hitter homers in that game. Legally it is trading a CFTC-regulated event contract, not placing a sportsbook wager, and the practical differences, the two-sided exit above all, are the subject of this page. Our guide to sports on Kalshi covers the broader sports board.
How do you trade home runs on Kalshi? Find the day's games under the KXMLBHR ticker family, open a game, and each listed hitter has his own yes/no market. Buy yes if you think he homers, buy no if you think he does not, or sell either side you already hold. The order in which you do things matters more than most people expect: lineups are the event that reprices these markets hardest, so a contract bought the night before is a bet on the card as much as on the bat, and a contract bought after the card posts is a narrower question at a worse price.
When do Kalshi home run markets close? Each hitter's market runs against its own game, so the ticker's start time is the clock you are trading into. That is also why the exit and the settlement are two separate decisions: everything before first pitch is a trade you can still leave, and everything after it is a hold to $1 or $0.
Prop-style MLB questions extend to the first frame too — see what ’first inning runs’ means.
Trading MLB Home Runs On Kalshi: The Bottom Line
So here is the whole page in one habit. Read the price as a probability, check the depth before you assume you can get out, and let a real move rather than a one-cent wobble be the thing that takes you out. The prices themselves are usually matched or beaten by the sportsbooks, so trade these for the exchange structure and the regulated venue, which is what the instrument genuinely gives you. The same mechanics run everything else on the exchange, and our prediction-market hub, built around the daily temperature contracts, is where the structure gets its full treatment.
Disclosure and fine print. Stokastic trades prediction markets and holds positions in them. We have no affiliate or commercial relationship with Kalshi; we do carry sign-up offers for some other prediction-market and betting platforms, including Polymarket. Kalshi event contracts are CFTC-regulated event derivatives traded on a designated contract market, not sportsbook wagers, and a position can lose its full value. Selling an unlikely outcome collects a small premium and risks most of a dollar, so one loss can erase many wins; size accordingly. 18+, and availability is state-specific; confirm eligibility with Kalshi before funding an account. Nothing here is trading advice, and nothing on this page is a pick or a recommendation.
Trade prediction markets on Polymarket too. Most readers here already have Kalshi — Polymarket is the other major venue, and code OS4 on the Polymarket US App: Deposit $10, get a $20 trading bonus. Get the Polymarket US bonus → Full terms live on our Polymarket promo code page.
Affiliate disclosure: OddsShopper earns a commission on signups through this link. We have no affiliate or commercial relationship with Kalshi, so our commercial incentive points away from the exchange this page is about; judge the comparison above with that in mind.
18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See polymarket.com/tos for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.
