I use a simple banking model to study the circumstances under which excessive and inefficient securitization may occur. I first stress that increasing securitization rates that reduce banks' incentives to screen borrowers and thus lead to more defaults need not be inefficient. This may be an efficient response to higher gains from trade between banks and fixed-income markets in the presence of bank moral hazard. I then argue that if reaping such higher gains from trade induces a reduction in the informational efficiency of the securitization market, then there is room for excessive securitization. The model points at increased transparency and informational efficiency of the securitization market as key improvements for the future of the banking system.
Keywords: banking; securitization; liquidity
Views expressed in the paper are those of the authors and do not necessarily reflect those of the Bank of Japan or Institute for Monetary and Economic Studies.