Interest-rate fee substitution: credit facilitation in segmented markets

Staff working papers set out research in progress by our staff, with the aim of encouraging comments and debate.
Published on 20 March 2026

Staff Working Paper No. 1,176

By João Cocco, S Lakshmi Naaraayanan and Jagdish Tripathy

We use administrative data covering the universe of mortgage originations to individual real estate investors in the United Kingdom to study financing outcomes following a large, unanticipated increase in interest rates. Post-shock, originations become more concentrated among specialist lenders, who exhibit lower interest rate pass-through for larger borrowers. To offset these smaller rate increases, they charge higher loan fees, thereby attenuating the impact of higher rates on interest-coverage ratios and facilitating credit. High-frequency evidence from loans on offer show similar responses, indicating that specialist lenders adjust product design to target specific borrower types and, in doing so, reinforce market segmentation.

Interest-rate fee substitution: credit facilitation in segmented markets