Pronóstico: Next UK Chancellor of the Exchequer in 2026?

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Active sub-markets

Market context

The underlying event is whether Rachel Reeves will be replaced as the UK’s chief financial minister before the end of 2026, with the market assigning a 54% chance that a new Chancellor will be officially appointed by the Monarch. Historical precedent shows that Chancellors often serve multiple years unless a major political shift occurs; for instance, George Osborne held the role for six years, while Alistair Darling served only three during the 2008 crisis. The current 54% probability suggests traders are betting on a leadership change, likely tied to the recent resignation of the UK Prime Minister, which has accelerated speculation about a reshuffle in the Treasury [5].

Key catalysts for traders include the timing of the next UK Cabinet reshuffle, any formal announcement from Downing Street regarding Reeves’ position, and the outcome of the upcoming special election hinted in recent fiscal reporting [9]. Traders should monitor statements from the Prime Minister’s office and Treasury Committee hearings, as Reeves faced scrutiny over the Spring Statement for 2026 [6]. The market’s leading outcome is Ed Miliband at 38%, followed by Wes Streeting at 28%, indicating a strong preference for a political outsider or reformist figure [1]. Any delay in reshuffle announcements or confirmation of Reeves’ reappointment would sharply reduce the “YES” probability.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.