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Continuous Workout Mortgages: Efficient Pricing and Systemic Implications

Shiller, Robert J, Wojakowski, Rafal M, Ebrahim, M Shahid and Shackleton, Mark B (2017) Continuous Workout Mortgages: Efficient Pricing and Systemic Implications Journal of Economic Behavior and Organization.

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This paper studies the Continuous Workout Mortgage (CWM), a two in one product: a fixed rate home loan coupled with negative equity insurance, to advocate its viability in mitigating financial fragility. In order to tackle the many issues that CWMs embrace, we perform a range of tasks. We optimally price CWMs and take a systemic market-based approach, stipulating that mortgage values and payments should be linked to housing prices and adjusted downward to prevent negative equity. We illustrate that amortizing CWMs can be the efficient home financing choice for many households. We price CWMs as American option style, defaulting debt in conjunction with prepayment within a continuous time, analytic framework. We introduce random prepayments via the intensity approach of Jarrow and Turnbull (1995). We also model the optimal embedded option to default whose exercise is motivated by decreasing random house prices. We adapt the Barone-Adesi and Whaley (1987) (BAW) approach to work within amortizing mortgage context. We derive new closed-form and new analytical approximation methodologies which apply both for pricing CWMs, as well as for pricing the standard US 30-year Fixed Rate Mortgage (FRM).

Item Type: Article
Divisions : Faculty of Arts and Social Sciences > Surrey Business School
Authors :
Shiller, Robert J
Wojakowski, Rafal
Ebrahim, M Shahid
Shackleton, Mark B
Date : 22 December 2017
DOI : 10.1016/j.jebo.2017.12.006
Copyright Disclaimer : © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Uncontrolled Keywords : Negative equity; House price index indexation; Repayment mortgage; Insurance; Embedded option to default; Prepayment intensity.
Depositing User : Melanie Hughes
Date Deposited : 19 Dec 2017 14:50
Last Modified : 22 Jun 2019 02:08

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