Asset Pledgeability and Endogenously Leveraged Bubbles

47 Pages Posted: 7 Nov 2015 Last revised: 5 Oct 2018

See all articles by Julien Bengui

Julien Bengui

Université de Montréal

Toan Phan

Federal Reserve Banks - Federal Reserve Bank of Richmond

Date Written: April 17, 2018

Abstract

We develop a simple model of defaultable debt and rational bubbles in the price of an asset, which can be pledged as collateral in a competitive credit pool. When the asset pledgeability is low, the down payment is high, and bubble investment is unleveraged, as in a standard rational bubble model. When the pledgeability is high, the down payment is low, making it easier for leveraged borrowers to invest in the bubbly asset. Moreover, when loans are pooled together in a competitive market, the pricing of individual default risk may facilitate risk-taking. In equilibrium, credit-constrained borrowers may optimally choose a risky leveraged investment strategy -- borrow to invest in the bubbly asset and default if the bubble bursts. The model implies a close relationship between the boom and bust of housing prices and securitized credit.

Keywords: rational bubbles, collateral, household debt, equilibrium default

JEL Classification: E12; E24; E44; G01

Suggested Citation

Bengui, Julien and Phan, Toan, Asset Pledgeability and Endogenously Leveraged Bubbles (April 17, 2018). Journal of Economic Theory​, 177, 2018, pp. 280-314, Available at SSRN: https://ssrn.com/abstract=2687489 or http://dx.doi.org/10.2139/ssrn.2687489

Julien Bengui

Université de Montréal ( email )

Montreal, MD Quebec
Canada

Toan Phan (Contact Author)

Federal Reserve Banks - Federal Reserve Bank of Richmond ( email )

P.O. Box 27622
Richmond, VA 23261
United States

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