Keir Starmer latest: PM has ‘full confidence’ in Wes Streeting despite resignation threat

UK political instability intensified as reports said Health Secretary Wes Streeting is preparing to resign and trigger a Labour leadership contest, with more than 80 Labour MPs and four ministers already calling for Prime Minister Starmer to go. The turmoil pushed 30-year gilt yields to 5.81%, their highest since 1998, and kept 10-year yields near 5.11%, reflecting rising borrowing-cost pressure. The King’s Speech still outlined major policy priorities including EU rapprochement, NHS reform, energy independence, defense spending, and new security legislation, but market focus is on whether the government can remain stable enough to govern.

Analysis

The immediate market read-through is not the headline leadership drama itself, but the policy vacuum it creates at the exact moment UK rates and fiscal credibility are fragile. When governing cohesion breaks, term premia usually rise before the political outcome is clear: gilt duration becomes the first casualty, and bank funding spreads can widen even if the eventual successor is seen as more market-friendly. That matters for JPM specifically because a more left-leaning or weaker cabinet could revive UK bank tax and financial-sector rhetoric, pressuring RoTE assumptions and risking a rerating of London capital-allocation plans.

The second-order winner is not the challenger; it is any asset that benefits from an eventual snap-back to policy discipline. If a contest drags on for weeks, sterling and long gilts remain vulnerable, but if the market starts pricing a technocratic or fiscally orthodox reset, the curve can retrace quickly. The key asymmetry is that political instability has a short half-life for equities but a longer one for duration: a short-lived leadership crisis can still leave lasting damage if it pushes borrowing costs higher into the next funding window.

Consensus is likely overestimating the odds of a clean ideological pivot and underestimating the probability of an ugly status-quo outcome. The party’s internal math suggests fragmentation, not a decisive mandate for any one challenger, which means the most likely near-term scenario is continued uncertainty rather than a fast policy reset. That makes the trade less about picking the next leader and more about positioning for elevated UK risk premia that compress only when the contest fails to materialize or produces an explicitly market-friendly successor.

Key Decisions for Investors

• Long UK rate volatility via receiver swaptions on SONIA or a gilt-vol overlay for 1-3 months; risk/reward favors owning convexity while political uncertainty keeps the 30-year yield pinned near cycle highs.
• Pair trade: short UK long-duration sovereigns vs long Bunds for 4-8 weeks; if Westminster instability persists, gilt term premia should stay sticky even if global rates ease.
• Reduce/hedge JPM exposure on UK-specific financial policy risk for the next 2-6 weeks; a leftward drift in Labour rhetoric would be negative for bank tax and capital-return sentiment.
• Event-driven long GBP/USD only on confirmation of a market-friendly consolidation candidate; otherwise stay flat or short sterling as leadership chaos premium can extend quickly.
• Watch for any explicit call for a snap election; if that becomes the base case, rotate toward defensive UK domestic equities and away from rate-sensitive banks and homebuilders.