arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2603.17954q-fin.RMmath.PRq-fin.MF
收藏

稳健的准凸风险度量及其应用

Robust quasi-convex risk measures and applications

University of Eastern Piedmont(东皮埃蒙特大学);Università dell’Insubria(因苏布里亚大学);University of Milano-Bicocca(米兰比可卡大学)

Francesca Centrone, Asmerilda Hitaj, Elisa Mastrogiacomo, Emanuela Rosazza Gianin

AI总结:

本文提出一种稳健准凸风险度量框架,通过模糊性不确定性集构建稳健性,结合两种机制继承准凸性,并推导其对偶表示,揭示模糊性对可接受性和资本分配的影响。

摘要:

本文发展了一种统一框架,用于在经典凸和现金可加设置之外对风险度量进行稳健化。我们考虑了Lp空间上的通用风险度量,并通过捕捉模糊性的不确定性集家族构建其稳健对应物。两种互补机制生成稳健准凸度量:第一种机制下,准凸性从初始风险度量在凸不确定性集下继承;第二种机制下,准凸性来自不确定性集自身的准凸(或c-准凸)结构。基于Cerreia-Vioglio等人(2011)和Frittelli和Maggis(2011)的工作,我们推导了稳健准凸和现金子可加风险度量的对偶(惩罚型)表示,证明了经典凸现金可加情况作为特殊实例出现。我们进一步分析了在稳健化下的接受家族和资本分配规则,突显了模糊性如何影响可接受性和资本分布。

英文摘要:

This paper develops a unified framework for the robustification of risk measures beyond the classical convex and cash-additive setting. We consider general risk measures on Lp spaces and construct their robust counterparts through families of uncertainty sets that capture ambiguity. Two complementary mechanisms generate robust quasi-convex measures: in the first, quasi-convexity is inherited from the initial risk measure under convex uncertainty sets; in the second it comes from the quasi-convex (or c-quasi-convex) structure of the uncertainty sets themselves. Building on Cerreia-Vioglio et al. (2011); Frittelli and Maggis (2011), we derive dual (penalty-type) representations for robust quasi-convex and cash-subadditive risk measures, showing that the classical convex cash-additive case arises as a special instance. We further analyze acceptance families and capital allocation rules under robustification, highlighting how ambiguity affects acceptability and the distribution of capital.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑