A general randomized test for Alpha
资产定价模型中 Alpha 的一般随机化检验AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确检验具有可观测、可交易因子的线性资产定价模型,并以联合零 Alpha 为原假设。
资产定价模型中 Alpha 的一般随机化检验AI 解读 ↓
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We propose a methodology to test for the null hypothesis that the alphas of a panel of asset returns are jointly equal to zero in a linear factor pricing model with observable and tradable factors — that is, the null of “zero alpha”. The test is based on equation-by-equation estimation, using a randomized version of the estimated alphas, which only requires rates of convergence. The distinct features of the proposed methodology are that it does not require the estimation of any covariance matrix, and that it allows for both N and T to pass to infinity, with the former possibly faster than the latter. Further, unlike extant approaches, the procedure can accommodate conditional heteroskedasticity, non-Gaussianity, and strong cross-sectional dependence in the error terms. We also propose a derandomized decision rule to choose in favor or against the correct specification of a linear factor pricing model. Monte Carlo simulations show that the test has satisfactory properties and it compares favorably to several existing tests. The usefulness of the testing procedure is illustrated through an application of linear factor pricing models to the constituents of the S&P 500.