An Intertemporal CAPM Approach to Evaluate Mutual Fund Performance

Merton (1973) and Campbell (1993) have demonstrated that if an investor anticipates information shifts, he will adjust his portfolio choice today in an attempt to hedge these shifts. Exploiting these insights, we construct a new performance measure to evaluate fund managers' hedging ability. This new measure is different from two widely adopted performance evaluation measures: securities selectivity and market timing. Moreover, an econometric methodology is developed to simultaneously estimate the magnitudes of these three portfolio performance evaluation measures. The results show that mutual fund managers are on average with positive security selection and negative market timing ability. Furthermore, the mutual funds with investment style classified as Asset Allocation generally have positive hedging timing ability.     

Testing the CAPM revisited

This paper re-examines the tests of the Sharpe–Lintner Capital Asset Pricing Model (CAPM). The null that the CAPM intercepts are zero is tested for ten size-based stock portfolios and for twenty five book-to-market sorted portfolios using five-year, ten-year and longer sub-periods during 1965–2004. The paper shows that the evidence for rejecting the CAPM on statistical grounds is weaker than the consensus view suggests, and highlights the pitfalls of testing multiple hypotheses with the conventional heteroskedasticity and autocorrelation robust (HAR) test with asymptotic P-values. The conventional test rejects the null for almost all sub-periods, which is consistent with the evidence in the literature. By contrast, the null is not rejected for most of the sub-periods by the new HAR tests developed by Kiefer et al. (2000), Kiefer and Vogelsang (2005), and Sun et al. (2008).     

The role of co-skewness in the pricing of real estate

The current study investigates whether systematic skewness offers an alternative perspective as to why the risk-adjusted returns on real estate should be similar to that for stocks. This is not a trivial issue since an affirmative finding implies that we might be incorrectly measuring real estate risk from both a pricing and a portfolio allocation perspective. A multivariate test of the Kraus-Litzenberger model is used to investigate this skewness proposition with the K-L CAPM tested against several alternative versions of the CAPM. The study finds that the Kraus-Litzenberger model offers additional insights into the measurement of real estate risk. Evidence is also found that both the zero beta and the consumption-oriented CAPM hold, which is consistent with the recent literature in real estate.     

基于稳态分布的资本资产定价模型上海股市实证分析

运用BS估计和OLS估计对资本资产定价模型在我国证券市场的应用进行了实证分析,分析结果显示,运用OLS方法对建立在资产收益为正态分布基础上的传统资本资产定价模型与运用BS方法对资产收益为α稳态分布的资本资产定价模型的贝塔系数估计值存在较大的差异,而BS估计方法明显比OLS估计方法更有效率。     

论市场组合对贝塔系数及CAPM的影响

本文以实证方法研究同仁堂股票在不同市场组合下的贝塔系数,以及在各市场组合下CAPM对股票的期望收益,将期望收益与实际收益进行比较,验证了股票收益与其贝塔系数呈现出较强的正相关关系,从而有力支持了CAPM;同时验证分析得到,选择合适的市场组合,使股票性质与市场组合联系越紧密,用CAPM得到的期望收益与实际收益越相符。     

On the Endogeneity of the Mean-Variance Efficient Frontier

The endogeneity of the efficient frontier in the mean-variance model of portfolio selection is commonly obscured in the portfolio selection literature and in widely used textbooks. The authors demonstrate this endogeneity and discuss the impact of parameter changes on the mean-variance efficient frontier and on the beta coefficients of individual assets.     

CAPM与投资项目的风险调整资本成本

公司投资某些风险项目的决策往往会改变公司的资本成本,如何估计调整后的资本成本是一个不可忽略的问题.本文以实例详细解释了如何运用CAPM来有效地估计风险调整后的资本成本以及如何根据调整后的资本成本做出合理的投资决策评价.