The strength and usefulness of CAPM before and after the Global Financial Crisis

Creation of portfolios based on different industries and market capitalization to determine the accuracy of the CAPM before and after the Global Financial Crisis.<br>Investigating if different forms of calculating betas for portfolios can increase/decrease the accuracy of the CAPM.<br><br>Calculation of betas.<br>Kolmogorov smirnov test, Normality, T-tests and descriptive statistics.

基于不同行业与市值构建投资组合，以测定全球金融危机前后资本资产定价模型（CAPM）的准确性。<br>探究投资组合beta值（beta）的不同计算方式是否会提升或降低CAPM的准确性。<br><br>beta值的计算。<br>柯尔莫哥洛夫-斯米尔诺夫检验（Kolmogorov-Smirnov test）、正态性分析、t检验及描述性统计。