16% — Will Shabana Mahmood be the next Chancellor of the Exchequer
Kalshi 16% · 5 contracts · $3K volume · medium confidence
Updated 2026-06-25 23:48:29 UTC

Why this matters:
This probability reflects the market's assessment that Shabana Mahmood has a 16% chance of becoming the next Chancellor of the Exchequer. As Justice Secretary in the current Labour government, she is positioned within the senior cabinet but faces competition from other senior figures for this specific role. The current probability is driven by two main dynamics: first, her distance from the Treasury and finance portfolio compared to other contenders, and second, the relatively low trading volume on her contract ($71 in 24-hour volume) compared to leading candidates like Wes Streeting (50¢, $1,114 volume). Her ascension would primarily depend on either a significant shift in government priorities elevating her profile, or unexpected departures among higher-probability candidates. The resolution of this market is contingent on when a Chancellor vacancy actually occurs and the Prime Minister makes a successor appointment.

Key factors:
- Mahmood's current portfolio is Justice Secretary, not Treasury-aligned; leading candidates like Streeting hold Health and other senior roles
- Wes Streeting is priced at 50¢ while Mahmood is at 5¢, indicating markets view him as substantially more likely
- Mahmood's contract has minimal liquidity ($71 24h volume) versus top candidates with 10-25x higher volume, suggesting lower trader confidence
- Her advancement would require either an unexpected vacancy at Chancellor or a major cabinet reshuffle that elevates her Treasury profile
- No scheduled event or Treasury-related appointment timeline appears imminent that would directly impact her candidacy

Contracts:
- Will Ed Miliband be the next Chancellor of the Exchequer?: Ed Miliband — 18¢ Kalshi $2K (weight 61%)
- Will Yvette Cooper be the next Chancellor of the Exchequer?: Yvette Cooper — 21¢ Kalshi $396 (weight 14%)
- Will Shabana Mahmood be the next Chancellor of the Exchequer?: Shabana Mahmood — 5¢ Kalshi $303 (weight 10%)
- Will Wes Streeting be the next Chancellor of the Exchequer?: Wes Streeting — 30¢ Kalshi $302 (weight 10%)
- Will Pat McFadden be the next Chancellor of the Exchequer?: Pat McFadden — 6¢ Kalshi $131 (weight 4%)

---

## 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: 2026-06-25T23:20:50.365Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "16% per prediction markets (SimpleFunctions, June 2026)"
Canonical: https://simplefunctions.dev/answer/nextchancellor
Full data: https://simplefunctions.dev/api/public/query?q=Will%20Shabana%20Mahmood%20be%20the%20next%20Chancellor%20of%20the%20Exchequer
Provider: SimpleFunctions — https://simplefunctions.dev