Kalshi's 25% (before 2029) dwarfs Polymarket's 6% (before 2027) due to a 753-day resolution window gap rather than trader disagreement—the longer timeframe allows for compounding tail risks. Both markets reflect the current diplomatic reality: Trump abandoned military threats in January 2026, negotiations have shifted from "full acquisition" to expanded US military bases, and both Denmark and Greenland have unequivocally rejected sovereignty transfer.
Background, methodology, and platform context
Compare Acquisition of Greenland by the United States prediction market odds side by side across Polymarket, Kalshi, Limitless. Platforms show similar odds, with an average spread of just 0.7pp. Close agreement often signals strong market consensus. With $38.30M in combined trading volume across 3 outcomes, this is one of the most actively traded cross-platform prediction markets.
Descriptions normalized for comparison (outcome names replaced with [OUTCOME])
This market will resolve to "Yes" if the United States officially announces that Greenland will come under US sovereignty by December 31, 2026, 11:59 PM ET. Otherwise this market will resolve to "No". Sovereignty is defined as the transfer of the majority of the territory of Greenland from its current status as an autonomous territory within the Kingdom of Denmark to being under the formal governance or jurisdiction of the United States, either as a state, territory, or other classification within the US system. An official announcement made by the United States and Denmark that Greenland will come under US sovereignty will qualify, even if the actual transfer of sovereignty is yet to occur. Only announcements of official agreements or actions (e.g. executive order, signed legislation, etc.) will count - mere posts on Social Media will not. The resolution source for this market will be official information from the governments of the US, Greenland, and Denmark, however a consensus of credible reporting confirming that Greenland has come under U.S. sovereignty will also qualify.
If the United States acquires any part of Greenland before Jan 21, 2029, then the market resolves to Yes.
An announcement by the United States and the entity that controls any part of Greenland that it will happen is also encompassed by the Payout Criterion. any part of Greenland must come under formal governance or jurisdiction of the United States, either as a state, territory, or other classification within the US system, where it was not previously. Merely leasing a given part in territory – for example, setting up a military base on leased territory – is not encompassed by the Payout Criterion.
If the United States acquires any part of Greenland before Jan 21, 2029, then the market resolves to Yes.
Different platforms may use different resolution criteria, data sources, and settlement timelines.
Trade on Polymarket
Trade on Kalshi
Trade on Limitless
