Gabor Pinter, Emil Siriwardane and Danny Walker

In September 2022 the interest rate on UK gilts rose by over 100 basis points in four days. These unprecedent market movements are generally attributed to two key factors: the 23 September announcement of expansionary fiscal policy – the so-called ‘mini-budget’ – which was then amplified by forced sales by liability-driven investment funds (LDI funds). We estimate that LDI selling accounted for half of the decline in gilt prices during this period, with fiscal policy likely accounting for the other half. Balance sheet segmentation and operational issues slowed capital injections into LDI funds by well-capitalised pension schemes, leading LDI funds to instead sell gilts. Our analysis shows that these frictions were most pronounced for pooled LDI funds.