Sweden and Finland joined NATO in 2023 and 2024, ending decades of Nordic neutrality and representing the fastest expansion of the alliance since the post-Cold War wave. The prediction markets had this happening at very low probability until about six months before it did — a classic case study in how geopolitical discontinuities break prediction market models.
How NATO Expansion Markets Work
NATO membership requires two conditions: the applicant country wants in, and all 32 existing members agree. The second condition makes prediction markets complex — one hold-out can block the whole thing, as Turkey demonstrated by delaying both Sweden and Finland. Pricing NATO expansion requires both an assessment of candidate country intent AND a model of all 32 member states' positions.
The key insight: NATO expansion markets have historically been mispriced because traders under-model the veto risk. One objecting member can delay accession by years. Turkey has done it twice. Hungary has done it once. Always price the veto risk.
Who Are the Next Candidates?
Georgia, Ukraine, and Kosovo are the three most actively traded candidates in current NATO expansion markets. Ukraine trades as a post-conflict accession question, Georgia as a domestic politics question, and Kosovo as a recognition problem where several NATO members don't recognise it as a state.
- →Ukraine: historically low probability while conflict continues, significant repricing potential post-ceasefire
- →Georgia: depends heavily on domestic political evolution and the ruling party orientation
- →Kosovo: blocked by Spain, Slovakia, Romania recognition issues — low probability without breakthrough
- →Bosnia: possible medium-term candidate but internal political stability is a significant prerequisite