UK mini-budget and LDI crisis

Conditions at the time

Leverage and derivatives in pension-related LDI funds were vulnerable to sudden government-bond yield movements.

How events unfolded

Following the fiscal announcement on 9/23, government bonds plunged, and the Bank of England began temporary purchases on 9/28.

Stakeholders and impacts

Pension funds, LDI managers, government-bond intermediaries and the Bank of England responded to liquidity pressures.

Information available at the time

Intervention aimed to restore market functioning and interrupt the forced-selling spiral, not to shift toward monetary easing.

Findings confirmed later

Purchases ran through 10/14, and the purchased assets were sold again by 2023/1.

Alternative interpretations and limitations

Distinguish the fiscal-policy trigger from existing leverage vulnerabilities; do not describe this as a uniform policy-rate cut.

Source-based context and interpretation

The Bank of England's retrospective recorded purchases ending at the deadline and subsequent sale of the holdings. Intervention aimed to break LDI margin-call and fire-sale feedback. Its purpose, pricing, duration and exit differed from monetary-policy purchases. ASSETCASTING interpretation: Hedging long-term pension obligations does not ensure cash for short-term margins. Similar-looking purchases are not all rate cuts or conventional QE. Restored market functioning differs from long-term pension solvency.

Evidence coverage through 2023-01-12 · Sources checked 2026-10-14

• Financial stability buy/sell tools: a gilt market case study ↗

Related events and periods1

• Inflation response and interest-rate adjustment →

  An event or period whose recorded start falls within this editorial interval. This does not establish that it caused or represents the characteristics of the era, nor guarantee that the entire period falls within the interval.