Where Collateral Sleeps
Working Paper 34266
DOI 10.3386/w34266
Issue Date
Banks can use the discount window to fend off a run by prepositioning assets with the Fed and borrowing against them. Following the March 2023 bank runs, policymakers have considered mandatory prepositioning, arguably the largest update to the lenderof-last-resort toolkit in over a century. We study the forces that shape the largest banks’ prepositioning. We show that run-prone uninsured-deposit flows causally drive prepositioning and that banks face a prepositioning stigma, even absent borrowing. Prepositioning is no panacea—banks still need good assets to borrow against—but it can help at the margin.