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Nonlinear term structure dependence: Copula functions, empirics, and risk implications

Journal of Banking & Finance 2006 30(4), 1171-1199
This paper documents nonlinear cross-sectional dependence in the term structure of US-Treasury yields and points out risk management implications. The analysis is based on a Kalman filter estimation of a two-factor affine model which specifies the yield curve dynamics. We then apply a broad class of copula functions for modeling dependence in factors spanning the yield curve. Our sample of monthly yields in the 1982–2001 period provides evidence of upper tail dependence in yield innovations; i.e., large positive interest rate shocks tend to occur under increased dependence. In contrast, the best-fitting copula model coincides with zero lower tail dependence. This asymmetry has substantial risk management implications. We give an example in estimating bond portfolio loss quantiles and report the biases which result from an application of the normal dependence model.

Rewarding risk-taking or skill? The case of private equity fund managers

Journal of Banking & Finance 2017 80, 14-32
We examine whether typical private equity fund compensation contracts reward excessive risk-taking rather than managerial skill. Our analysis is based on a novel model of investment value, cash flows, and fee dynamics of private equity funds. Given the embedded option-like fee components, our results demonstrate that fund managers indeed have an incentive for excessive risk-taking when only fee income from the current fund is considered. However, when managers also consider potential compensation from follow-on funds, their risk-taking incentives depend on their individual skill levels, and skilled managers will have an incentive to reduce fund risk. We also show that managers must generate substantial abnormal returns in order to compensate investors for the given fee components.

Time for gift giving: Abnormal share repurchase returns and uncertainty

Journal of Corporate Finance 2021 66, 101787
We study share repurchase announcements for nine European countries between 2000 and 2017. In contrast to previous studies, we address the role of market uncertainty as a market-based determinant of positive average abnormal announcement returns, while including governance, liquidity risk and firm related control variables. Economic policy uncertainty and financial uncertainty, individually as well as jointly, positively affect abnormal returns. We suggest that this relation is due to a stronger signaling effect under increased uncertainty, as both information asymmetry and underpricing tend to increase. Also, a potential hedge against adverse market movements is more valuable. Optimal timing of repurchase announcements should therefore consider market uncertainty conditions.