Insurers monitor shocks to collateral: micro evidence from mortgage-backed securities

Staff working papers set out research in progress by our staff, with the aim of encouraging comments and debate.
Published on 21 February 2025

Staff Working Paper No. 1,119

By Thiemo Fetzer, Benjamin Guin, Felipe Netto and Farzad Saidi

This paper examines how insurance companies monitor and react to cash-flow shocks in commercial mortgage-backed securities (CMBS). Using detailed micro data around the onset of the Covid pandemic, we show that lease expiration predicts commercial real estate mortgage delinquency, particularly for offices due to lower demand. Insurers monitor these risks and sell more exposed CMBS – mirrored by a surge in small banks holding CMBS. This monitoring effort also affects insurers’ trading in other assets, indicating limited risk assessment capacity. Our findings reveal that institutional investors actively monitor underlying asset risk and can even gain informational advantages over some banks.

Insurers monitor shocks to collateral: micro evidence from mortgage-backed securities