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Practice paper

Anticipating market model failure: Competitive pressure and the mortgage backed securities market

Jean Czerlinski Whitmore
Journal of Risk Management in Financial Institutions, 7 (2), 145-152 (2014)
https://doi.org/10.69554/JIGA3113

Abstract

Market models that have worked well for years can suddenly fail dramatically, such as during the financial crisis of the late-2000s. For example, models that assigned credit ratings to mortgage-backed securities (MBS) predicted relative default rates well for decades. It was only in the late-2000s that these models under-predicted defaults by orders of magnitude. Why then? This paper argues that high competitive pressure spurs market participants to change strategies, which can break models. Behavioural research has demonstrated the powerful effect of competition on people's strategies. Indeed, it was in the mid-2000s that competitive pressure spiked among mortgage originators and securitisers, as measured by indicators such as changing market share. Originators and securitisers reacted with a variety of new strategies: creating new mortgage types like no-documentation loans, improving the efficiency of back office processing of mortgages, reducing quality control and, in some cases, committing fraud. Unfortunately, credit rating agencies, secure in their dominant market positions, had no spur to update their models to keep up with the changes. Thus, risk managers could anticipate model failure by monitoring competitive pressure in the relevant markets.

Keywords: risk management; model failure; competition; behavioural finance

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Author's Biography

Jean Czerlinski Whitmore develops risk management software at an options trading firm. She earned a master’s degree in sociology from the University of Chicago, did graduate research with psychologist Gerd Gigerenzer and earned her undergraduate degree in physics.

Citation

Whitmore, Jean Czerlinski (2014, March 1). Anticipating market model failure: Competitive pressure and the mortgage backed securities market. In the Journal of Risk Management in Financial Institutions, Volume 7, Issue 2. https://doi.org/10.69554/JIGA3113.

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cover image, Journal of Risk Management in Financial Institutions
Journal of Risk Management in Financial Institutions
Volume 7 / Issue 2
© Henry Stewart
Publications LLP

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