Non-parametric and semi-parametric asset pricing: An application to the Colombian stock exchange

We estimate non-parametrical one-factor and three-factor international Capital Asset Pricing Models (CAPM) and find strong evidence for rejecting the linear CAPM specification. Furthermore, we find inconsistent linear betas for a series of stocks in the Colombian stock exchange (BVC), supporting the hypothesis of better and consistent fit of non-parametrical versions of the CAPM.     

组合投资的系统风险与非系统风险——兼评王辉等人的《投资组合风险的分散化研究》

本文在指出王辉等人的《投资组合风险的分散化研究》一文中出现的错误的基础上,根据资本资产定价模型(CAPM)将组合投资的风险分离为系统风险与非系统风险,最后讨论了组合投资的均值-方差模型。     

Decomposing the bias in time-series estimates of CAPM betas

We identify two sources of bias arising from time-series regression used to compute beta. This bias arises due to the classical error in variables problem and a ‘mechanical interaction’ which exists when the index comprises the asset of interest. Assuming that the market is proxied by a fixed-weight index, we demonstrate that the relative weighting of an asset within the index, and/or the magnitude of its idiosyncratic risk, directly biases the beta estimate for the individual stock and also for all stocks within the index. Via simulations, we show that the problem is most pronounced for markets with a small number of highly concentrated assets. Finally, we propose a procedure to reduce this bias and apply the methods to equity data.     

电网建设项目融资租赁基准收益率的确定

在电网建设项目融资租赁中,出租人进行投资决策时首先面临的问题就是确定项目融资租赁的基准收益率。采用资本资产定价模型(CAPM)与加权平均资本成本法相结合的方法,计算出了电网建设项目融资租赁的基准收益率。该方法不但适用于电网建设项目融资租赁,同样适用于其他行业的融资租赁项目。     

Alternative Models for Estimating the Cost of Equity Capital for Property/Casualty Insurers

This paper estimates the cost of equity capital for Property/Casualty insurers by applying three alternative asset pricing models: the Capital Asset Pricing Model (CAPM), the Arbitrage Pricing Theory (APT), and a unified CAPM/APT model (Wei (1988). The in-sample forecast ability of the models is evaluated by applying the mean squared error method, the Theil U2 (1966) statistic, and the Granger and Newbold (1978) conditional efficiency evaluation. Based on forecast evaluation procedures, the APT and Wei's unified CAPM/APT models perform better than the CAPM in estimating the cost of equity capital for the PC insurers and a combined forecast may outperform the individual forecasts.     

Does conditional market skewness resolve the puzzling market risk-return relationship?

In this paper, we employ instrumental variables methods that allow time-varying risk and reward-to-risk to test various conditional asset pricing models. We find a negative partial relation between the market excess return and conditional market variance. In contrast with recent findings, we show that this negative relationship is not due to the omission of the hedge term associated with the ICAPM. However, conditional market skewness seems to partly account for this negative risk-return relationship.     

奥运板块股票市场资本资产定价模型实证研究

本文以我国A股市场奥运板块全部94支股票为研究对象，选取2007年最新的股票数据对资本资产定价模型在奥运板块股票市场的应用进行实证研究。首先采用一次回归模型估计了个股的β系数，然后利用BJS方法和FM模型分别进行时间序列回归和截面回归。实证研究表明，CAPM模型在奥运板块市场应用中存在与理论不相符合的方面。为了消除单个股票的非系统性风险，进一步构造股票投资组合对CAPM模型进行修正检验，得出的β系数能更好地衡量股票组合的风险。     

The effect of environmental and social performance on the stock performance of european corporations

This paper examines the effect of sustainability performance of European corporations on their stock performance, measured as the average monthly stock return from 1996 to 2001. The econometric analysis is based on common empirical asset pricing models, particularly on the multifactor model according to Fama and French (1993, Journal of Financial Economics, 33:3–56). The consideration of sustainability performance is two-fold: The average sustainability performance of the industry in which a corporation operates and the relative sustainability performance of a corporation within a given industry. The main result is that the average environmental performance of the industry has a significantly positive influence on the stock performance. In contrast, the average social performance of the industry has a significantly negative influence. The variables of the relative environmental or social performance of a corporation within a given industry have no significant effect on the stock performance. As a by-product, the econometric analysis implies that some results of Fama and French (1993, 1996, The Journal of Finance, LI (1):55–84) regarding the risk factors of the multifactor model need not hold true for different observation periods, for different stock markets, and for the use of single stocks (instead of portfolios). An erratum to this article can be found at     

中国股票市场Beta和收益关系的实证分析

本利用Pettengill(1995）的剩余市场收益模型以及Fama的两阶段回归方法，考察了中国股市1997年1月-2001年5月上海证券交易所的21支股票的周收益率。当市场收益在于无风险收益时，Beta和收益显正相关，当市场收益低于无风险收益时，Beta和收益显相关。可见，Beta在解释股票间的差异方面是一个有用的工具。