The Florida governor primary odds on Kalshi stopped being a question days ago. Byron Donalds trades at 98.7 cents for the August 18 Republican nomination, a price that has barely twitched in a week, so there is no real edge left on the outright. The board still taking genuine disagreement is the one asking who finishes second, and as of this morning that fight belongs to Jay Collins at 77 cents, with James Fishback the live longshot at 22.
Updated August 17, 2026 · 7 min read · By Jake Hari
A week ago the story on this page was a favorite at 98 cents and a penny-stock challenger soaking up the volume. The favorite still has not moved, and that is the point. The nomination board churns more contracts than almost anything else on Kalshi, but almost all of that is two-way argument-trading on James Fishback's one-cent line, not fresh conviction about who wins. The genuine, still-unresolved disagreement has moved down the card, to the second-place board, and there is a real two-name race there worth reading.
The Quick Answer
Byron Donalds is priced at about 98.7 cents to win the August 18 Republican nomination for Florida governor, a number the market has treated as all but decided since early voting opened. With his price frozen, the tradeable question has moved to Kalshi's second-place board, where Jay Collins is the 77-cent favorite to finish runner-up and James Fishback sits at 22 cents. About 32,600 second-place contracts traded in the last 24 hours. The full runner-up board, the thin third- and fourth-place ladders, and why a one-cent candidate is still the most-traded name in the whole event are below.
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The Market: The Top Line Is Settled, SO The Edge Is Down-Ballot
Kalshi's Florida Republican nominee event asks one question per candidate: will this person win the party's nomination for the 2026 governorship? Donalds resolves that question. He holds a one-tenth-of-a-cent spread, 98.6 bid against 98.7 ask, a 98.7% implied chance, on more than four million contracts of open interest. Florida's mandatory early-voting window ran August 8 through 15, vote-by-mail ballots have been going out since mid-July, and most summer surveys put his nearest rival 30 or more points back. The book is liquid and lopsided, not thin, just settled: the interesting trading is no longer on the outright.
One caution before reading too much into where the contracts pile up: contract counts are not dollars, and they are not conviction. The nomination board did about 4.76 million contracts in the last 24 hours, among the heaviest contract counts on all of Kalshi, but roughly 3.4 million of those are Fishback's one-cent line changing hands, two-way argument-trading on a name the same board prices at a 1.2% chance of winning. When the favorite's price is frozen at 98.7, extra volume on his event is noise, not information. The place where prices can still move on new information is the undercard: Kalshi lists separate boards for who finishes second, third, and fourth. The second-place board alone carried about 32,600 contracts in the last day, and unlike the nomination line, its prices are still discovering an answer. That is where this refresh lives.
The Runner-Up Board: Collins 77¢, Fishback 22¢
Here is the live market on the morning before the primary, Kalshi's "Florida Republican governor primary: 2nd place" event.
| Candidate | Second-Place Price | Implied Probability | 24h Contracts |
|---|---|---|---|
| Jay Collins | 77¢ | ~77% | 4,218 |
| James Fishback | 22¢ | ~22% | 14,315 |
| Paul Renner | 2¢ | ~2% | 10,636 |
| Byron Donalds | 1¢ | ~1% | 3,453 |
| Casey DeSantis | 1¢ | ~1% | 0 |
Source: Kalshi trade API, event KXPRIMARYPLACE-KXGOVFLNOMR-2, fetched the morning of August 17, 2026. Prices are last trade; the board's asks sum to about 104%, the normal overround on a mutually exclusive field. Casey DeSantis is carried by Kalshi but never filed with the Florida Division of Elections.
The row I keep coming back to is Paul Renner's. He trades at a penny or two to finish second, yet more than 10,000 of his second-place contracts changed hands in the last day, more volume than Collins drew, and almost all of it is money buying the No side. That churn is not indecision about Renner. The market is actively paying to say he will not be the runner-up, because it has him slotted further down the ladder, and the fourth-place board proves it out. Collins, the state's lieutenant governor and the man who sued to knock Fishback off the ballot in June, is the clean favorite to be Donalds's closest challenger. Fishback at 22 cents is the only live threat to that, and the two of them account for essentially the entire board.
More live election boards: 2028 Republican nominee odds · 2028 Democratic nominee odds · Texas Senate odds · the full markets hub
The Rest Of The Ladder: Third And Fourth Get Thin Fast
Kalshi lists placement boards for third and fourth too, and reading them together shows a market with a firm pecking order. On the third-place board Fishback is the favorite in the high 50s to low 70s, a wide quote that implies anywhere from a 56% to a 73% chance, with Renner and Collins behind him. On the fourth-place board Renner flips to the favorite, quoted anywhere from 77 to 88 cents (a 77% to 88% implied read), with Fishback the next name down.
Stack those four boards and the market's implied finishing order is clean: Donalds first, Collins second, Fishback third, Renner fourth. But I treat the third and fourth boards as directional, not precise. They carried only thin volume in the last 24 hours, single digits on the third-place board and not much more on the fourth, and the bid-ask spreads run anywhere from a few cents to nearly 20 cents wide, so a single order can move a quote. The second-place board is the one with the depth to trust; the lower rungs are a sketch of consensus, not a settled price.
Vote Share Is A Projection, Placement Is A Sims Bracket
Public polling through the summer put Donalds anywhere from the high 30s to the mid 50s, with most averages in the low-to-mid 40s and his nearest rival 30 or more points back. So how does a candidate polling short of a majority trade at a 98.7% price, and how does a market put such confident numbers on who comes second?
Because vote share and finishing position are different units, and these contracts pay out on the second one. Any Stokastic reader who has compared a median projection to a sims win rate has already done this math. A hitter's median projection is not his chance of leading the slate; sim the night ten thousand times and small, persistent edges turn into outsized shares of the first-place finishes. A primary is the same engine. Donalds's 30-point polling lead does not convert to a 30-point price edge, it converts to nearly all of the probability mass, because the paths where anyone runs him down in the final week are tail scenarios. The runner-up board is just the same simulation resolved one bracket down: with the winner removed, who most often lands in the second slot. You see the identical compression when you run MLB DFS projections, ownership and stacks in the DataHub through a simulation, comfortable leads in the median column become lopsided finishing-position percentages, because placing is a threshold, not an average.
That framing is the honest way to read Collins at 77 cents. The number is not a statement that he is a strong candidate in any absolute sense. It is the market saying that across the plausible outcomes, he lands in second far more often than Fishback does.
Where The Volume Went: 24 Million Contracts On A One-Cent Candidate
Hold the promise from the top of this page, the challenger soaking up the volume. Here is the payoff. James Fishback, an investment-firm founder who launched his campaign in November 2025, has never led the nomination market, yet his one-cent contract is the most-traded instrument in the entire event by a wide margin. Of the roughly 40.4 million contracts that have traded on the nominee board, about 24.6 million are Fishback's, close to three of every five (about 61%), and about 17.8 million sit as open interest.
He did not generate that with a path to winning. He generated argument, and argument is what trades. In June, Collins sued to knock him off the ballot over the state's seven-year residency requirement; a Leon County judge ruled on July 27 that Fishback stays on. Then in early August, Fishback claimed Donalds was under federal investigation, a claim the Justice Department called false within two days. Each is a binary sub-event that pulls two-way money into a contract, and the tape shows it: about 3.4 million Fishback contracts traded in the last 24 hours, more than any other name, while Donalds ticked up from 98.0 to 98.7 cents. The market heard the loudest story of the race and raised the favorite anyway. Every one of those 17.8 million open contracts has a Yes holder and a No holder; that number measures disagreement still on the books, not belief in an upset.
A tournament player has a name for this shape: ownership without equity. The field piles onto the story of the week while the sims quietly show the play's win rate never justified the attention. On this board it also explains the runner-up market, the same energy that made Fishback the volume king is what keeps his second-place line at a live 22 cents instead of dead.
A Worked Example: What 77 Cents On Second Place Pays
Say you like Collins to finish second and buy at the 77-cent ask. A Kalshi contract pays $1 on a Yes, so price equals implied probability: 77 cents means a 77% priced-in chance. You are risking 77 cents to win 23, laying roughly 3.3-to-1 on a bet the market already calls a 77% favorite over a Fishback line that implies just 22%.
Fees are the adjustment that decides whether that is worth it. Kalshi's standard taker fee is about 0.07 times price times one minus price, which at 77 cents works out to roughly 1.2 cents per contract, so your real net on a win is closer to 21.8 cents against 77 at risk. Two wrinkles. Kalshi rounds fees up to the next cent per order, so a small ticket can surrender more of that edge than the per-contract figure suggests, and the capital is tied up until the market settles. Compare that to buying the Donalds outright at 98.7 cents, where the entire ceiling is 1.3 cents before fees, and the runner-up board is simply where the tradeable margin still is. The market being right about Donalds is not the same thing as the Donalds contract being worth buying; the second-place line is where a real price still moves.
What Could Move The Board Before August 18
The nomination itself is close to inert. With early voting closed and a 30-plus-point gap, no routine poll reprices Donalds on his own, and a slice of any near-certain price this close to settlement is simply time value, capital parked until official reporting rather than live upset risk. The movement left is on the placement boards. A late surge for Fishback in the early-vote and mail returns, or any sign that Collins underperformed his polling, is the one thing that flips the 77-to-22 runner-up line. An appellate reversal of the July 27 ruling that kept Fishback on the ballot would reshape it instantly, and a withdrawal or health event would reshuffle every board at once. And the graveyard rows tell you how this market handles dead storylines: Casey DeSantis's nominee contract traded hundreds of thousands of times on a run that never became a filing, and she now sits at a tenth of a cent.
Whoever clinches on August 18 moves to the November 3 general in a state Trump carried by about 13 points in 2024, most likely against former congressman David Jolly, who leads the Democratic primary field in public polling. That race has its own market, and if the summer's pattern holds we will put the same field-pricing lens on it.
Settlement Timeline
- August 8 to 15, 2026: Florida's mandatory statewide early-voting window (counties could add days on either end); now closed.
- August 18, 2026: primary day. The nomination and the finishing order are decided.
- On the official result: each contract can settle early once the outcome is official.
- November 3, 2026: listed market expiration, and general election day in Florida.
- Prices on this page are as of the morning of August 17, 2026, and re-score when the story moves.
Every read we quote here gets graded in public once the market settles, on the same public scoreboard as every Model Verdict call, so you can check afterward whether the 77-cent runner-up line and the 98.7% favorite held up. That is the accountability I want on a board this lopsided: not a take, a number that gets a grade.
These prices reflect real traders' money, not a prediction of fact, and nothing here is financial or trading advice. Kalshi is a CFTC-regulated exchange; 18+, availability varies by state.
FAQ
Who is going to win the Florida Republican governor primary? Kalshi prices Byron Donalds near 98.7 cents, a roughly 98.7 percent implied chance of winning the August 18 nomination. He has led wire to wire since taking Trump's endorsement in February 2025.
Who will finish second? That is the live question now. Kalshi's second-place board makes Jay Collins the 77-cent favorite over James Fishback at 22 cents, with everyone else priced at a penny or two.
When does it settle? Primary day is August 18, 2026; the contracts can resolve once the official result is in, with a listed expiration of November 3.
Why is Fishback the most-traded name if he's a longshot? His one-cent contract has traded about 24.6 million times, roughly three of every five in the event, on the back of a summer ballot lawsuit and an August claim about Donalds, volume built on argument, not on a path to winning.
The Bottom Line
Two numbers describe the Florida governor primary odds on primary eve: 98.7 and 77. The first is the market pricing the Republican nomination as all but decided, the field-concentration math that turns a projection lead into a lopsided sims number. The second is where the money actually still moves, Collins as the 77-cent favorite to be the runner-up, with Fishback the one live longshot against him. When the main event is settled, you read down the card, here and on a Saturday slate, and the full markets hub carries the live price until the boards settle on August 18.
