Greenland Odds 2026: Three Contracts, Wrong Order

Published 25 September 2026 · Prices frozen 25 September 2026, 21:30 UTC

Search for Greenland odds today and every page that ranks was written in January. Newsweek has 18% and 41.5%; Kalshi’s own newsroom has 27% and 44%; Bloomberg ran the story on 7 January. Nobody has touched the number since, and in the eight months between then and now the two Polymarket contracts they were quoting have fallen 91.3% and 86.6% to 2.65¢ and 2.75¢. That is not a small drift in a quiet market: $46.4m has traded across the pair. We read both exchanges in the same pass, pulled the lifetime daily history on every contract that matters, enumerated Kalshi’s four Greenland series, and put the signed text of the 22 September agreement next to the resolution criteria it was supposed to satisfy. The short version is that the deal happened, the market initially thought it counted, it does not count — and on the way down the three contracts ended up in an order that cannot be right.

Where Greenland odds stand after the deal

Five Polymarket contracts and six Kalshi ones are live on Greenland. Here is the Polymarket side, which is where the money is.

Two things in that table are worth stopping on before anything else. The first is that Greenland voting itself out of the Kingdom of Denmark is priced above the United States acquiring so much as an acre of it — 4.15¢ against 2.65¢ — on a market with less than $50,000 of lifetime volume, which is a thin book making a point the deep ones are also making. The second is that the two big contracts, holding $46.4m between them, are 10 basis points apart while asking materially different questions. Section three is about why that cannot be right.

The live versions of the first three lines are on the acquire-any-part market, the sovereignty market and the invasion market, and refresh every ten minutes. The numbers in this article do not — they are frozen so the prose and the tables can never drift apart.

What the 22 September agreement actually does

On 22 September 2026, at the UN General Assembly in New York, Donald Trump, Danish prime minister Mette Frederiksen and Greenlandic premier Jens-Frederik Nielsen signed an agreement amending and supplementing the US-Denmark defence agreement of 27 April 1951. It is a real document with real consequences, and none of them is a transfer of territory.

The agreement has no end date, and it provides that if Greenland becomes independent it stays in NATO with its obligations intact. Article VI requires that the rights granted be exercised “in a manner that respects the Greenlandic society and the Greenlandic way of life”. Frederiksen called it “a deal that can last forever”; Nielsen called it a “win-win-win”; Trump called it “tremendous” and said he would immediately begin building “two very major military bases”. Everybody got a sentence they liked, which is what a compromise looks like.

Three contracts, one nested question, the wrong order

Polymarket lists three contracts on the same underlying event with the same 31 December 2026 deadline, and they are logically nested. Read the rules and the containment is close to total.

The broad contract explicitly counts acquisition by force, so an invasion that achieves control resolves both it and the invasion contract. It counts sovereignty transfers over any defined area, so a majority transfer resolves both it and the sovereignty contract. It should therefore be the most expensive of the three, and it is not. It sits in the middle, ten basis points below the narrowest question on the board.

Before anyone reaches for a spreadsheet: this is not free money. To put the trade on you would buy the broad contract at its 2.80¢ ask and sell the narrow one at its 2.60¢ bid, paying 0.20¢ for the privilege of holding a position that cannot lose. The same is true of the invasion pair. The anomaly is real at the mid and unharvestable at the quote, which is the honest answer and also the interesting one, because it tells you what has happened to these books.

What has happened is that the price fell far enough that the wording stopped mattering. The market used to price it: on 8 January the broad contract opened at 14.50¢ against 7.50¢ for the narrow one, roughly double, and that ratio held all year — 10.50¢ against 5.65¢ as late as 1 July. Below about 5¢, with a 0.1¢ tick and a spread of 0.3¢, three logically distinct questions collapse into the same trade. The ordering is not a signal about Greenland. It is the sound of a market that has stopped distinguishing.

Why Polymarket lurched and Kalshi barely moved

The week of 18 September is the cleanest natural experiment these two venues have run on each other all year. Same news, same deadline, two rulebooks.

The spike is not stupidity. Polymarket’s second resolution route is a binding instrument establishing “primary or exclusive jurisdiction or control” over a defined area “such that the ordinary legal authority of Denmark and Greenland do not apply, except by U.S. permission”. A trader reading a presidential post about permanent control over a defined area of Greenland, before any text existed, was reading a live question. It went from 3.95¢ to 7.50¢ and back to 2.20¢ in five sessions — a 90% rally and a 71% collapse — and both legs were rational given what was knowable on the day.

Kalshi’s equivalent contract never had the question, because its secondary rules answer it in advance: “Merely leasing a given part in territory — for example, setting up a military base on leased territory — is not encompassed by the Payout Criterion.” That sentence is the entire difference between the two venues this week. Kalshi wrote the 2026 base case into the rules at market creation; Polymarket left it to interpretation, and paid for it in a 5.3-point round trip.

This is the same lesson the Iran regime-change pair teaches from the other direction, where two contracts eight points apart differ only in whether an internal succession counts. Read the criteria before the price, every time.

Polymarket vs Kalshi, line by line

Kalshi runs four Greenland series against Polymarket’s five standalone markets, and only one pair lines up cleanly on deadline and intent.

Put the matched pair side by side and the venues are crossed: Kalshi bids 3.10¢ for a contract Polymarket offers at 2.80¢. On two books with hundreds of thousands of contracts of open interest that ought to be impossible, and the resolution is the least glamorous one available. Kalshi’s bid is 200 contracts deep — $6.20 of resting money, about sixty cents of gross edge before fees, before the fact that the two venues have different access rules and different settlement. It is a crossed quote, not an arbitrage, and the 2.7-point width of Kalshi’s near-dated spread is the real story: 342 contracts traded there in 24 hours.

Note also that Kalshi’s near contract is the narrower of the two — the lease exclusion makes sure of it — and still prints above Polymarket’s broader one. The complex is now mis-ordered across venues as well as within them, which at these price levels is what you should expect.

The 2029 curve says the deadline is doing the work

Kalshi lists both of its Greenland questions twice, once to 1 January 2027 and once to the end of the presidential term. That gives a term structure Polymarket cannot offer, because Polymarket stops at the end of this year. Convert each pair to a constant monthly hazard rate and the shape is clear.

Both rows price the next 3.2 months as riskier per month than the two years after them, which is unusual and, here, defensible: the negotiation that produced the 22 September agreement is live, the follow-on talks are live, and a signature is a dated event in a way that “sometime before 2029” is not. The purchase contract is the striking one at 3.93 times — the market is saying that if the United States is going to buy Greenland it happens in the next hundred days or not at all, which reads as a judgement that the current moment of leverage does not recur.

The level gap between the two 2029 contracts is the other finding here. Acquiring any part by any means trades at 25.50¢; buying at least part of it from Denmark trades at 12.00¢. Both are the same horizon. Control without a purchase is priced at roughly twice a purchase, and given that the actual 2026 outcome was expanded basing rights obtained for nothing, that ordering looks like the one thing on this board the market has got exactly right.

Kalshi’s price ladder: what a purchase would cost

The most unusual contract in this complex asks not whether the US buys Greenland but for how much. Kalshi’s KXGREENLANDPRICE series runs eight mutually exclusive rungs through Trump’s term, with total monetary consideration defined to include cash, Treasury securities, assumed debt, infrastructure commitments and recurring assistance capitalised at fifty times the annual amount — and to exclude the imputed value of military protection and of natural resources.

The ladder is coherent at the mids and incoherent at the last trades, which is a useful demonstration of why last-trade quoting is a trap on thin books. At the mids the seven purchase rungs sum to 9.90¢ against the 8.55¢ that the no-acquisition rung implies — 1.35 points of overround across eight contracts, which is tight. At last trade the same rungs sum to 19.60¢ against the same 8.60¢, an eleven-point contradiction produced entirely by stale prints on rungs that have not traded in 24 hours.

Two things stand out in the distribution. The first is that the modal non-zero outcome is $600-899bn at 2.30¢, which is an enormous number and not an obviously silly one given the terms of the definition — fifty years of capitalised assistance plus infrastructure adds up fast. The second is that the whole purchase distribution is worth 9.90¢ while Kalshi’s own buy-at-least-part contract on a near-identical horizon trades at 12.00¢. Those should be the same number. They are 2.1 points apart, which is the cost of the definitional edges — this ladder requires a treaty transfer and quantifies consideration, the simpler contract does not.

What to watch: a snap election, then 31 December

Three dated things sit between now and the end of this complex, and one of them is brand new.

A Greenlandic snap election. Kalshi opened a series on it on 21 September, the day between the reporting and the signature. It has not traded once, but it is quoted, and the quotes make a clean ladder: 8.5¢ before 2027, 12.5¢ before July 2027, 16.5¢ before 2028. That is the market putting a number on domestic Greenlandic backlash to an agreement its own premier signed, and it is the single most informative new line on the board — a well-ordered curve on a question nobody was asking a week ago.

Implementation. Watch whether building at Narsarsuaq and Mestersvig produces any instrument that goes further than access. The Polymarket contract’s second route needs Danish and Greenlandic law to stop applying inside a defined area; nothing yet signed does that, and if a status-of-forces annex ever did, the 2.65¢ would not be 2.65¢ for long.

31 December. All five Polymarket contracts settle at once, almost certainly at No, and the interesting question is what replaces them. Kalshi already has the 2029 board; Polymarket does not. Whether it relists at a 2027 or a full-term horizon will tell you whether the venue thinks this story has another act, and the January reopening price will be the cleanest read on that we get.

Related on GeoOdds

• Will the US acquire part of Greenland in 2026 — live odds, chart and the full three-route resolution criteria
• Will Trump acquire Greenland before 2027 — the sovereignty contract, and why an announcement alone will not do it
• Will the US invade Greenland in 2026 — the contract that only needs an offensive to be commenced
• Greenland odds hub — every active Greenland market with 24-hour moves
• Iran regime change odds — two contracts, eight points apart, separated by one clause
• Polymarket vs Kalshi on the Venezuela leader market — the same cross-venue method, on a book that is not crossed
• Will China invade Taiwan — a date ladder on a market Kalshi does not list at all

Sources: the Polymarket Gamma and CLOB public APIs (events 148292, 118172, 145536, 160520 and 147773) and the Kalshi public single-market API (KXGREENTERRITORY-29, KXGREENLAND-29, KXGREENLANDPRICE-29JAN21 and KXGREENLANDSNAP-28), both read at 25 September 2026, 21:30 UTC; resolution-criteria quotations are from the market rules as published on Gamma and Kalshi. The agreement text and its operative terms are from the White House publication of 22 September 2026; Al Jazeera for the signing, the named defence areas and the quotations from Trump, Frederiksen and Nielsen; the Christian Science Monitor on what the deal leaves in Danish and Greenlandic hands; and the Greenland crisis timeline for the 18 September post and the dated events of January to September 2026. Prices captured 25 September 2026, 21:30 UTC and not updated since. Nothing here is investment advice — see our disclaimer.