An expansion in mortgage credit to subprime borrowers is widely believed to have been a principal driver of the 2002 … purchase mortgages to subprime borrowers. We also document that the expansion in speculative mortgage products and underwriting …

We provide new evidence that credit supply shifts contributed to the U.S. subprime mortgage boom and bust. We collect … original data on both government and private mortgage insurance premiums from 1999-2016, and document that prior to 2008 …