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The 2022 UK gilt crisis: the mini-budget and pension LDI funds
Sept–Oct 2022· Crisis or event
Fact, law or dataA rule, statute, definition or measured number.
A UK bond-market panic in autumn 2022, when unfunded tax cuts collided with pension funds' leveraged hedging funds.
See it on the Money & Finance map →How it works
On September 23, 2022, Chancellor Kwasi Kwarteng's 'mini-budget' announced about £45 billion of tax cuts with no independent cost forecast. Gilts (UK government bonds) sold off and the pound hit a record low near $1.03. Pension funds' liability-driven investment (LDI) funds, which hedged with borrowed money, faced collateral calls and sold gilts, pushing yields higher still. On September 28 the Bank of England began emergency purchases, buying £19.3 billion in all. Prime Minister Liz Truss resigned on October 20.
Why it matters
It showed that a rich country's bond market can punish a fiscal plan within days, and that hidden leverage inside 'safe' pension hedges can force fire sales.
Think of it like
Like an owner whose rate hedge works on paper, but whose lender demands cash collateral by Friday.
Facts, rules and data
Bank of England letters to Parliament's Treasury Committee (October 2022), its Financial Stability Reports, Office for Budget Responsibility records, and daily gilt yield and sterling data.
Debates and risks
How much blame belongs to the mini-budget versus LDI leverage and earlier rate rises is debated; some argue any sharp yield jump would have set off the spiral.
Connections (3)
▸The 2022 UK gilt crisis: the mini-budget and pension LDI funds was amplified by pension funds' Leverage: amplifying gains and losses with debtFact, law or data
The connection
LDI funds held gilts and interest-rate swaps worth several times their cash, often using repo borrowing, so pensions could hedge long liabilities while keeping money in growth assets. When long gilt yields jumped more than a point in days, lenders demanded collateral; funds sold gilts to raise it, pushing yields higher in a self-reinforcing spiral.
When and why
September 23–28, 2022, in UK pooled and single-client LDI funds run by large managers such as Legal & General, BlackRock and Insight Investment.
How we know
Bank of England letters reporting several LDI funds near negative net asset value on September 27, when the 30-year yield rose 67 basis points from its morning low.
Debates and risks
How much leverage was too much is debated; since 2023 UK regulators expect LDI funds to withstand about a 2.5-point jump in yields.
▸Fiscal policy: Congress, taxes and spending can spook bond markets, as in The 2022 UK gilt crisis: the mini-budget and pension LDI fundsFact, law or data
The connection
Governments borrow by selling bonds, so a fiscal plan must look affordable to buyers. The mini-budget offered about £45 billion of unfunded tax cuts, skipped the usual independent forecast, and came while the Bank of England was fighting 10% inflation. Investors demanded much higher yields to hold gilts, raising borrowing costs for the government and homebuyers alike.
When and why
Announced September 23, 2022, by Chancellor Kwasi Kwarteng under Prime Minister Liz Truss; mostly reversed by his successor Jeremy Hunt in October.
How we know
Gilt yields and sterling moved sharply within hours of the statement, and UK lenders withdrew hundreds of mortgage products that week (Moneyfacts).
Debates and risks
Whether markets punished the tax cuts themselves or the lack of a credible plan, and whether the US faces similar risk, is debated.
▸The 2022 UK gilt crisis: the mini-budget and pension LDI funds hit UK defined-benefit pensions, a kind of Retirement accounts and pension funds: 401(k)s, IRAs, pensionsFact, law or data
The connection
UK defined-benefit pensions promise retirees a set income for life, so they used LDI to hedge against falling interest rates. Ironically, rising yields shrank their liabilities and improved funding on paper, but the collateral calls forced many schemes to sell corporate bonds, property funds and other assets quickly to keep their hedges.
When and why
Hundreds of UK corporate defined-benefit schemes, many of them small users of pooled LDI funds, in late September and October 2022.
How we know
Pensions Regulator guidance, Parliament's Work and Pensions Committee inquiry (2023), and Bank of England accounts of schemes' rushed asset sales.
Debates and risks
Whether LDI helped or hurt schemes overall is debated; US 401(k) savers were not directly affected, and US pensions generally used less leverage.