We present new evidence that lenders use down payment size to price unobservable borrower risk. We exploit the contractual features of a UK scheme that helps home buyers top up their down payments with equity loans. We find that a 20 percentage point smaller down payment is associated with a 22...

Since Basel II was introduced in 2008, two approaches to calculating bank capital requirements have co-existed: lenders' internal models, and a less risk-sensitive standardised approach. Using a unique dataset covering 7 million UK mortgages for 2005–15, and novel identification, we provide...