Collateralized debt obligations (CDOs) and private-label mortgage-backed securities (MBS) backed by nonprime loans played a central role in the recent financial crisis. Little is known, however, about the underlying forces that drove investor demand for these securitizations. Using micro-data on...

When borrowers are delinquent, senior debtholders prefer liquidation whereas junior debtholders prefer to maintain their option value by delaying resolution or modifying the loan. In the mortgage market, a conflict of interest (“holdup”) arises when servicers of securitized senior liens are...