The Bank of England published a staff working paper examining UK mortgage refinancing around the interest rate shock that followed the September 2022 mini-budget. Borrowers exposed to the shock became 11 percentage points more likely to select two-year rather than five-year fixed-rate mortgages, even though two-year products were about 10 basis points more expensive and provided less protection against future rate increases. The share of adjustable-rate mortgages also rose, but most borrowers continued to choose two-year fixes. The research links a 200 basis point increase in mortgage rates to a 2 to 3 percentage point decline in average loan-to-value ratios and finds that borrowers became less likely to switch lenders. The preference for two-year fixes is consistent with demand for short-term payment protection combined with the flexibility to refinance or extract equity sooner if rates fall. Supporting evidence shows that borrowers with two-year fixes are more likely than those with five-year products to extract equity in subsequent years.