中国A股市场“小公司效应”的实证分析

本文以1995年1月至2003年12月期间在上海、深圳证券交易所交易的的全部A股股票为样本,分别以流通市值与总市值来衡量公司规模,对中国A股市场的“小公司效应”进行实证分析,研究表明:①作为规模度量的流通市值与总市值的选择对公司规模的排序没有显著影响。②最小规模公司股票组合获得显著的超额收益,且拥有最高的经风险调整后的收益(Sharpe比率),中国A股市场存在“小公司效应”。     

The determinants of momentum in the United Kingdom

This study examines the effects of size, analyst coverage, and book-to-market in explaining momentum profits in UK stocks. We document a pattern of momentum in UK stocks and find that momentum profits are negatively related to firm size, analyst coverage, and book-to-market. We find that book-to-market is more important than coverage and coverage is more important than size in explaining momentum profits. We examine the book-to-market effect closely and find that a value premium exists for past stock losers, but a growth discount exists for past stock winners. Finally, the results of this study provide mixed support for the information diffusion hypothesis of Hong and Stein (1999).     

A CLOSER LOOK AT VALUE PREMIUM: LITERATURE REVIEW AND SYNTHESIS

This paper provides a systematic review of value premium literature that examines the performance difference between value and growth stocks and the possible reasons for it. We compare and synthesize the results from the different regional stock markets and different sample periods. The literature is categorized according to stock selection criteria that are based on either individual valuation ratios, such as E/P, B/P, D/P, S/P, CF/P, and enterprise value-based multiples, or composite value criteria that aim to capture more than one dimension of relative value simultaneously or combine them with other classification criteria. We also compare the efficacy of various selection criteria to each other and synthesize the literature on the explanations for the value anomalies. The overall evidence shows that the best criterion varies over time and across the markets. The relative efficacy of different valuation criteria also seems to depend on numerous methodological choices. Recent studies have given mild evidence that combining traditional valuation ratios either with each other or with some financial statement variables could at least in some cases enhance the value premium, although very few studies have provided transparent comparisons between the results based on individual valuation ratios and those based on composite value criteria.     

跨市场上市公司审计定价研究

本文从我国跨市场上市公司审计师选择的特点出发,考察了境内外审计市场不同需求弹性对审计收费的影响,并对协同效应和范围经济对审计定价的影响进行了研究。结论表明,当审计师对境外报表进行审计时,“四大”的审计收费显著高于非“四大”。而当会计师事务所对境内报表进行审计时,“四大”的审计定价与非“四大”相比无显著差异。结论验证了“四大”不同市场不同定价的竞争策略,如果进行审计的会计师事务所之间可以实现协同效应或范围经济,从而能节约跨市场上市公司的时间和精力,上市公司将愿意付出更多的审计费用。结论支持了境内会计师事务所可以通过与境外会计师事务所建立联系构筑竞争优势的策略。     

Re-examining risk premiums in the Fama–French model: The role of investor sentiment

This paper reconstructs the Fama–French three-factor (F–F) model as a panel smooth transition regression (PSTR) framework to investigate the differentiated effects of investor sentiment proxies-the volatility index (VIX), credit default swap (CDS), and TED spread-on the three risk premiums. Sample period spans from 2003: 1Q to 2013: 4Q. Sample objects are 58 semiconductor companies listed on Taiwan Security Exchange Corporation. The empirical results report that stock returns display a nonlinear path, and the three risk premiums are time-varying, depending on different proxies of investor sentiment in different regimes. Market premiums fall as investors in stock markets show extreme optimism or extreme pessimism. Except in rare situations, the size premium is significant and decreases with the increase in the VIX. Returns in holding growth stocks dominate holding value stocks when the investors show extreme pessimism or optimism. However, in normal sentiment of investment, value stocks earn more returns than growth stocks.     

Idiosyncratic risk,market risk and correlation dynamics in the US real estate investment trusts

This study examines total, market and idiosyncratic risk and correlation dynamics using weekly return data on two US REIT firm samples from 1988 to 2008. We find that both market and idiosyncratic variance are time-varying and that idiosyncratic variance represents a dominant component of a REIT firm’s total variance. We find a decline in idiosyncratic risk as well as a rise in average REIT correlation during the new REIT era, from 1993 to 2008. This recent downward trend of idiosyncratic risk among REITs is different to the stylized upward trend of idiosyncratic risk among stocks. There is bi-lateral Granger causality between the market and idiosyncratic risks. Finally, we detect a positive relationship between the idiosyncratic risk and expected returns, implying that the risk premium of REITs is positively related to the idiosyncratic risk during the period new REIT era, 1993–2008. Our results have important asset-pricing implications for under-diversified investors.     

最终控制人与多元化价值效果——基于上市公司平衡面板数据的检验

众多研究表明,多元化对企业价值有显著影响,但是多元化究竟是增加了企业的价值还是减少了企业的价值则没有一致的结论。本文通过对2001至2004年我国上市公司的平衡面板数据进行分析后发现,多元化显著增加了上市公司的企业价值。无论是中央控股的国有上市公司还是地方控股的国有上市公司,均存在溢价现象,中央控股公司的多元化溢价的程度,显著大于地方控股公司的多元化溢价程度。而民营控股公司的多元化行为对企业价值没有显著影响。     

Corporate Governance,Investment, and Firm Valuation in Asian Emerging Markets

We investigate the effects of corporate governance and family ownership on firm valuation through investment efficiency in Asian emerging markets. Using 3 years of time series data from the Credit Lyonnais Securities Asia corporate governance score for 10 Asian emerging markets, we find that good corporate governance leads to better or more efficient investment decisions and eventually to higher firm value. We also find that investors reward firms for improvement in corporate governance. The findings do not hold for Asian firms with a family or concentrated ownership structure. The results are not driven by changes in accounting standards in these markets.     

Liquidity and firm value in an emerging market: Nonlinearity,political connections and corporate ownership

This study re-examines the relationship between liquidity and firm value in the emerging stock market of Malaysia, exploring the issues of nonlinearity and moderating variables. Using data for all non-financial firms traded on Bursa Malaysia over the sample period of 2000–2015, the results from the baseline quadratic model suggest stocks must be traded higher than the threshold liquidity level before reaping the benefit of larger firm value. Our key finding of a nonlinear relationship remains robust to alternative liquidity measures and estimation methods, as well as passing a series of endogeneity checks. Using an ideal candidate of lot size reduction for Malaysian stocks in May 2003 as exogenous liquidity shock, we establish the causal effect from liquidity to firm value. Further interaction analyses uncover three important moderating variables in the liquidity-firm value relationship, in which the value impact demands a more liquid market for Malaysian public firms with political connections, higher foreign nominee ownership and higher foreign institutional ownership.     

The effect of interconnectivity on stock returns during the Global Financial Crisis

This paper examines the role of interconnectivity in global stock markets during the Global Financial Crisis (GFC) using a comprehensive dataset of 8,827 firms traded in developed and emerging markets. Our contribution includes two key findings. We first use a difference-in-differences approach to show that stocks in countries with higher trade openness ex-ante to the GFC experienced lower average and annual cumulative returns of 9.08 p.p. and 36.32 p.p., respectively, compared to stocks traded in less exposed countries, one year after the crisis outbreak. Second, we employ complex network theory to analyze the role of network interconnectedness in our baseline results. To construct the network of interdependence between stock returns, we utilize a regularized Vector Autoregression Model, which enables us to overcome the limitations of commonly used correlation networks. Our findings suggest that while a firm’s high connectivity before the crisis can alleviate adverse shock effects resulting from export dependence, this effect may be weakened if the firm’s performance is closely linked to central firms.     

How well is productivity being priced?

By understanding how productivity shocks affect firm value, an entrepreneur can better compute the risk premium associated with uncertainty in production. This study explores the link between plant-level productivity and firm value for the baking and confectionary sector. From the impulse response analysis, the study finds that there is a lag in the firm’s response to productivity shocks at the plant level. Further, the paper employs Tobin’s Q as a valuation metric that acts as a link between a firm’s manufacturing plant productivity and firm value. Empirical estimations indicate that there is comovement between firm valuation and plant level productivity.     

Pricing the hedging factor in the cross-section of stock returns

We investigate the role of investors’ net hedging strategy (factor) in predicting stock returns and pricing the cross-section of individual stocks and equity portfolios. We estimate stock exposure to changes in the hedging factor and show that the hedging premium is driven by outperformance of stocks with large positive net hedging betas, which explains their higher average returns. We find the positive hedging premium indicates risk-averse investors demand extra compensation to hold stocks with higher equity risk premiums, and they are themselves willing to pay higher prices for stocks with positive hedging betas.     

上市公司分散化战略分析

本文调查了747家上市公司的成长性及其产业特征,考察了分散化的价值效应,探索了分散化战略对企业价值的影响方向。研究结果显示,分散化企业较之非分散化企业具有更高的成长性,即使在控制了企业规模、资产结构、财务杠杆以及股权结构等因素的影响之后,分散化对企业价值仍然存在显著的正向解释力。通过分析企业成长性的产业效应,进一步验证了分散化的溢价效应。同时还预测了分散化组织优势源于债务融资的税盾收益以及有效的内部资本市场所产生的财务协同效应。研究表明,在不发达的金融体系中分散化战略具有价值创造功能。     

Pricing unexpected illiquidity

The well documented positive relation between returns and lagged illiquidity suggests that illiquidity is a priced characteristic of stocks. Recent studies suggest that stock returns are inversely related to the contemporaneous unexpected illiquidity, which is consistent with price revisions to reflect realized illiquidity. This study analyzes the relations between stock returns and illiquidity innovations and finds that that the negative illiquidity shock premium persists beyond the contemporaneous interval. However, transaction costs overwhelm any potential profits from strategies that attempt to exploit the price adjustments to the shocks, suggesting the markets are efficient with respect to illiquidity information.     

价值投资：中国股票市场实证分析

已有的研究表明,在成熟市场中,价值股的投资收益率普遍高于热门股(亦称成长股)。那么,这一结论在新兴市场是否成立?本文运用组合法,对沪、深股市1996年至2004年期间的股票进行了系统的实证研究。我们发现,中国股市存在微弱的价值溢酬,但常用的价值指标与股票收益率之间的关系存在差异。研究结果表明,中国股票市场具有鲜明的新兴市场特征;但随着时间的推移,价值投资溢酬呈现逐渐提高的趋势。     

Individual stock sentiment beta and stock returns

Using the data in Chinese stock market, we measure the individual stock sentiment beta, which is defined as the sensitivity of individual stock returns to the individual stock sentiment changes. We demonstrate that stocks in the highest individual stock sentiment beta portfolio have significantly higher excess returns, CAPM alpha, Fama-French three-factor alpha and Fama-French five-factor alpha. Besides, we find that the high individual stock sentiment beta stocks are smaller, younger, more volatile stocks with higher price and higher market beta. After controlling for firm characteristic, the returns of High-Low individual stock sentiment beta portfolios are still significantly positive. Moreover, we show the effect of the individual stock sentiment beta on stock returns is positive and significant in different stock markets, in different sample periods, and in bull and bear market. Besides, the results of the Bayes-Stein individual stock sentiment beta are still stable.     

Value stocks and market efficiency

We form portfolios based on firm book-to-market equity ratios and apply stochastic dominance tests. Value (high book-to-market) portfolios dominate low book-to-market portfolios. Thus, value stocks are not rationally priced by the market and the book-to-market ratio is not an efficiently priced proxy for equity risk. We also find that the superior performance of value stocks is not due to the January effect.     

How Do Alphas and Betas Move? Uncertainty,Learning and Time Variation in Risk Loadings*

I employ a parsimonious model with learning, but without conditioning information, to extract time‐varying measures of market‐risk sensitivities, pricing errors and pricing uncertainty. The evolution of these quantities has interesting implications for macroeconomic dynamics. Parameters estimated for US equity portfolios display significant low‐frequency fluctuations, along patterns that change across size and book‐to‐market stocks. Time‐varying betas display superior predictive accuracy for returns against constant and rolling‐window OLS estimates. As to the relationship of betas with business‐cycle variables, value stocks’ betas move pro‐cyclically, unlike those of growth stocks. Investment growth, rather than consumption, predicts the betas of value and small‐firm portfolios.     

Learning remotely: R&D satellites,intra‐firm linkages,and knowledge sourcing

Firms venture abroad not only to access resources and markets but also to learn. Yet there remains limited empirical evidence that headquarters can access geographically remote knowledge by establishing a presence in the remote location. Using U.S. patent data, I show that firm headquarters disproportionately source knowledge from third parties in remote locations where they have an R&D satellite. This “satellite effect” on knowledge flow is economically significant, representing up to 60% of the knowledge‐flow premium associated with collocation. Furthermore, the effect seems to be stronger for recent knowledge, as well as in areas of satellite technological specialization, suggesting that firms can target cutting‐edge knowledge in specific sectors. In addition, the results show that firms with stronger internal linkages between headquarters and satellites, and those that staff satellites with inventors that previously patented while at other local firms, experience a larger satellite effect on knowledge acquisition.