Gilt Yields Spike as Pressure Mounts on Starmer: Ironically His MPs Want Change

1. Political backdrop

• UK gilt markets are under renewed pressure as Prime Minister Keir Starmer faces escalating calls to resign following Labour’s heavy losses in the 7 May local elections.
• More than 70 Labour MPs have urged him to step down.
• Home Secretary Shabana Mahmood and Foreign Secretary Yvette Cooper have reportedly pressed Starmer to set a departure timeline.
• Starmer is meeting the Cabinet this morning (12 May) as internal divisions widen.

2. Market reaction

• 10‑year gilt yields: ~5.1%
• 30‑year gilt yields: ~5.8%
  • Both levels reflect a sharp sell‑off, with long‑dated yields approaching multi‑decade highs.
• FTSE 100: Opened down ~1%, reflecting broader risk aversion.

3. Why markets are moving

Chris Beauchamp (IG) notes that:

• The political turmoil could lead to further instability, with no guarantee a successor could unify Labour’s parliamentary party.
• Markets are already pricing the risk of a “soft‑left” leadership candidate who may favour higher public spending, prompting investors to demand higher borrowing costs.

Interpretation:
Bond markets dislike uncertainty. A potential leadership contest, unclear fiscal direction, and the prospect of looser spending discipline are all feeding into higher yields.

4. Global factors adding pressure

• Middle East tensions have intensified after US President Donald Trump said the ceasefire with Iran was on “life support”, calling Iran’s proposal “unacceptable” and “stupid”.
• Brent crude has risen 2% to $106.9/barrel, adding to inflation concerns and pushing yields higher globally.

5. Comment - Implications

• Government borrowing costs continue to rise, reducing fiscal headroom.
• Mortgage rates may face upward pressure as swap rates follow gilt yields.
• Political clarity — or lack of it — is now a key driver of UK asset pricing.
• Index Linked and Fixed Interest Funds will fall in value (invested in gilts and bonds) presenting an investment opportunity for your pensions, ISA and general investment funds.