Various Ex-Post Financial Contributions to a Return and the Different Questions They Address
提出了一个框架，用于比较事后“对收益的贡献”这一财务绩效指标在不同应用层次上的多种计算版本，并分析哪个版本最能准确反映该指标的直观意图。
The author presents a framework for specifying and comparing different versions of the calculation of the ex-post “contribution to a return” financial performance measure for each of three levels of application. Employing this framework, the author analyzes a conceptually complete set of versions within each level in order to determine which version best coherently captures the intuitive intent in applying the measure at that level. Specifically, the three levels that the author will explicate are the ex-post contribution of 1) the return of a component of a portfolio on a day to the portfolio’s total return for that day, 2) the total return of a portfolio on a day to a portfolio’s total return for a multi-day period, and 3) the return of a component of a portfolio on a day to a portfolio’s total return for a multi-day period.