7% — Will Keir Starmer be the next Secretary General of NATO Kalshi 7% · 8 contracts · $0 volume · medium confidence Updated 2026-07-09 21:03:14 UTC Why this matters: This probability reflects the chance that UK Prime Minister Keir Starmer becomes NATO's next Secretary General, currently trading at 9% on prediction markets. NATO Secretary General positions typically go to senior figures with strong diplomatic credentials and support from member states, with the next scheduled election occurring in 2026. Starmer's relatively low probability reflects that other European political leaders—particularly Kaja Kallas, Ben Wallace, and Alexander Stubb—are viewed as more likely candidates by traders. The position requires consensus among NATO members, and UK domestic political constraints may limit Starmer's viability. Key drivers would be changes in NATO member preferences, developments in European geopolitics, or unexpected withdrawals by frontrunner candidates that shift the selection dynamics. Key factors: - Kaja Kallas is trading at 6¢ across multiple contracts—significantly higher than Starmer at 9¢—suggesting markets view other European leaders as stronger candidates for the role - NATO Secretary General elections require broad consensus among 32 member states; a sitting UK Prime Minister managing domestic governance may face practical constraints as a candidate - Ben Wallace (6¢) and other defense-focused European figures have more recent institutional experience with NATO structures than Starmer - The Secretary General election timing and any official announcements from current leadership or prospective candidates would provide material new information to resolve uncertainty - Starmer's probability could shift substantially if frontrunner candidates withdraw or if UK-NATO relations become a dominant political factor reshaping member preferences Contracts: - Will Alexander Stubb be the next Secretary General of NATO?: Alexander Stubb — 12¢ Kalshi $0 (weight 13%) - Will Ben Wallace be the next Secretary General of NATO?: Ben Wallace — 5¢ Kalshi $0 (weight 13%) - Will Klaus Iohannis be the next Secretary General of NATO?: Klaus Iohannis — 7¢ Kalshi $0 (weight 13%) - Will Kaja Kallas be the next Secretary General of NATO?: Kaja Kallas — 5¢ Kalshi $0 (weight 13%) - Will Keir Starmer be the next Secretary General of NATO?: Keir Starmer — 8¢ Kalshi $0 (weight 13%) - Will Mette Frederiksen be the next Secretary General of NATO?: Mette Frederiksen — 5¢ Kalshi $0 (weight 13%) - Will Petr Pavel be the next Secretary General of NATO?: Petr Pavel — 7¢ Kalshi $0 (weight 13%) - Will Ursula von der Leyen be the next Secretary General of NATO?: Ursula von der Leyen — 4¢ Kalshi $0 (weight 13%) --- ## Methodology SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours. ## SF Signal - SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration. - No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only. --- *Last verified: 2026-07-09T20:20:49.657Z* By SimpleFunctions — https://simplefunctions.dev/ Cite as: "7% per prediction markets (SimpleFunctions, July 2026)" Canonical: https://simplefunctions.dev/answer/nextnatosecgen Full data: https://simplefunctions.dev/api/public/query?q=Will%20Keir%20Starmer%20be%20the%20next%20Secretary%20General%20of%20NATO Provider: SimpleFunctions — https://simplefunctions.dev