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The impact of longevity improvements on U.S. corporate defined benefit pension plans
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ISBN: 1475554974 1475505183 1475526768 1475568096 9781475554977 9781475505184 9781475568097 9781475505184 9781475568097 9781475526769 Year: 2012 Publisher: [Washington, D.C.] International Monetary Fund

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Abstract

This paper provides the first empirical assessment of the impact of life expectancy assumptions on the liabilities of private U.S. defined benefit (DB) pension plans. Using detailed actuarial and financial information provided by the U.S. Department of Labor, we construct a longevity variable for each pension plan and then measure the impact of varying life expectancy assumptions across plans and over time on pension plan liabilities. The results indicate that each additional year of life expectancy increases pension liabilities by about 3 to 4 percent. This effect is not only statistically highly significant but also economically: each year of additional life expectancy would increase private U.S. DB pension plan liabilities by as much as $84 billion.


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Rating Through-the-Cycle : What does the Concept Imply for Rating Stability and Accuracy?
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ISBN: 9781475546132 1475546130 147551459X 9781475514599 147556323X 1299395414 Year: 2013 Publisher: Washington, D.C. : International Monetary Fund,

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Credit rating agencies face a difficult trade-off between delivering both accurate and stable ratings. In particular, its users have consistently expressed a preference for rating stability, driven by the transactions costs induced by trading when ratings change frequently. Rating agencies generally assign ratings on a through-the-cycle basis whereas banks' internal valuations are often based on a point-in-time performance, that is they are related to the current value of the rated entity's or instrument's underlying assets. This paper compares the two approaches and assesses their impact on rating stability and accuracy. We find that while through-the-cycle ratings are initially more stable, they are prone to rating cliff effects and also suffer from inferior performance in predicting future defaults. This is because they are typically smooth and delay rating changes. Using a through-the-crisis methodology that uses a more stringent stress test goes halfway toward mitigating cliff effects, but is still prone to discretionary rating change delays.


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Asset Securitization and Optimal Retention
Authors: --- ---
ISBN: 1462381987 145276316X 1282845624 9786612845628 1451982178 Year: 2010 Publisher: Washington, D.C. : International Monetary Fund,

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This paper builds on recent research by Fender and Mitchell (2009) who show that if financial institutions securitize loans, retaining an interest in the equity tranche does not always induce the securitizer to diligently screen borrowers ex ante. We first determine the conditions under which this scenario becomes binding and further illustrate the implications for capital requirements. We then propose an extension to the existing model and also solve for optimal retention size. This also allows us to capture feedback effects from capital requirements into the maximization problem. Preliminary results show that equity tranche retention continues to best incentivize loan screening.

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