不同市场条件下A股横截面收益影响因素研究

基于沪深股市1993-2009年剔除金融类股票的所有A股数据,分别采用投资组合分组方法和Fama-Macbeth横截面回归方法,研究了股票市值和账面市值比等因素在牛市和熊市时期对横截面收益的影响.研究结果表明,在牛市状况下,系统风险越大的股票、市值规模越小的股票收益越高,而在熊市状况下则相反；不论在牛市状况下还是熊市状况下,规模效应和账面市值比效应均表现显著.     

基于中信风格指数的股市规模效应分析

本文基于中信风格指数,对中国股市的规模效应现状展开分析。结论说明,从长期看,中国股市存在比较明显的规模效应,小市值股票回报率较高;在不同的时间段中,大市值股票和小市值股票交替领先;小市值股票的收益率较高,而大市值股票的波幅较缓。研究还证明,小市值股票与大市值股票的收益率差异在上涨时比下跌时更为显著。中国股市的规模效应成因主要可以归纳为“股价操纵”以及“收购效应”。     

我国股票市场流动性影响因素分析——来自中国A股证券市场的经验证据

本文从微观角度研究了股票市场流动性的影响因素。从公司业绩水平、资产规模、股票的市场风险、股价等方面分别进行了单因素相关性分析。结果发现：影响流动性的主要因素有每股收益、总资产、股票的贝塔系数和股价,而净资产收益率对流动性的影响不大,并且净资产收益率和每股收益之间存在偏相关关系。     

货币政策周期与股票横截面收益

采用中国A股市场数据,基于我国特定的货币环境定义货币政策周期,利用货币政策与风险特征的交叉变量,研究规模效应、价值效应等风险特征在不同货币周期下对股票横截面收益的解释能力。研究发现,添加货币周期变量之后的模型对于股票未来收益的解释能力,较传统资产定价模型具有显著的提高。规模效应(小市值公司表现优于大市值公司)在全样本周期内稳定存在,且在货币扩张期更为明显,这与货币信贷传导机制和我国信贷配置的制度环境是一致的。价值效应(价值股表现优于成长股)在货币紧缩期更为明显,在货币扩张期表现不显著,这与货币信贷传导机制和价值效应的风险特征是一致的。     

中国股票市场新股长期价格行为研究

考察沪深市场1997年1月1日至2001年6月30日间上市的A股股票在上市后3年内的收益状况发现,中国股票市场上的新股表现出显著的短期弱势、长期强势特征;与自编指数相比较,若以中信综指、中信风格指数为市场基准,将造成对大盘、中盘和小盘新股长期收益状况的认识偏差。同时,考察相关因素对新股长期收益状况的影响后发现,上市首日抑价水平和换手率较低的新股具有较高的投资价值,而抑价水平和换手率较高的新股投资价值则较低。     

非系统风险和股票预期收益研究——基于上海证券交易所的股票数据

本文选用2001年至2008年在上海证券交易所上市交易的211支股票的月度数据,对个股的非系统风险和股票预期收益之间的关系进行了实证研究。对于非系统风险的估计,本文采用了直接法,即对个股按照Fama的三因素模型进行回归,回归结果中的残差即为个股所面临的非系统波动率也即非系统风险。在得到个股的非系统波动率之后,本文将个股的公司规模因素、换手率因素、账面市值比因素以及滞后一期的非系统波动率作为自变量,个股的超额收益率作为因变量来研究股票的非系统风险和预期收益之间的关系。实证结果表明个股的非系统风险与预期收益之间是显著为负的关系,即若个股的非系统风险越大,则其预期收益越低。     

年报信息披露的超常收益及其影响因素

与年报盈余公告效应的研究不同,本文在拓展年报信息考虑范围的基础上,检验盈余信息、股利信息、账市比、成长性和财务风险等年报披露信息对不同公司规模的超常收益的解释能力。研究结果表明,年报信息披露窗口存在显著超常收益,账市比、盈余信息、股利信息对该超常收益有显著的解释能力,因为在大多数公司规模中,账市比、盈余信息的极端值含有股票未来收益的信息,账市比、盈余信息、股利信息对超常收益有显著的边际影响;但成长性和财务风险等年报信息仅对部分公司规模的超常收益有解释能力。     

基于Logistic模型的开放式基金异常分红问题研究

本文选取2006年、2007年开放式基金有关数据,运用Logistic模型对开放式基金异常分红的影响因素进行了实证分析,结果表明:我国开放式基金异常分红明显受到投资类型、单位基金可分配收益的影响,与基金最新规模、累计净值增长率、投资风格等因素没有显著的相关关系;股票型基金易发生异常分红现象,且与单位基金可分配收益显著负相关。     

基于Logistic模型的开放式基金异常分红问题研究

本文选取2006年、2007年开放式基金有关数据,运用Logistic模型对开放式基金异常分红的影响因素进行了实证分析,结果表明:我国开放式基金异常分红明显受到投资类型、单位基金可分配收益的影响,与基金最新规模、累计净值增长率、投资风格等因素没有显著的相关关系;股票型基金易发生异常分红现象,且与单位基金可分配收益显著负相关.     

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 financial investment decision of non-financial firms in China

This paper constructs a portfolio model to analyze the determinants of the financial investment decision of non-financial firms in China. Unlike the literature assuming that financial investments are riskless, our model allows risks in both fixed and financial investments. We show that this extension provides an analytically similar but economically different model from the literature. In particular, it is relative risk and risk-adjusted return gap, not pure risk and simple return gap that enter into firms’ financial investment decision model. Using firm-level panel data of 1902 firms listed in Chinese stock market over the period from 2006 to 2016 with semi-annual frequency, we find that the ratio of fixed investment risk over total risk dominates financial investment decisions of non-financial firms. However, rates of risk-adjusted return gap between financial and fixed investments play no role in Chinese firms’ financial investment decisions, which is in stark contrast to the results using a model assuming riskless financial investments. The baseline findings are robust to alternative measures of financialization and investment risk and different firm sizes, ownership structures and time periods.     

新企业会计准则中公允价值变动损益对新能源企业股价的影响分析

发展新能源产业是应对环境恶化的重要举措之一。本文选取我国上市公司中395家新能源企业在2007-2009年间的季报数据,运用面板数据分析方法,检验了公允价值变动损益与这类概念股市价的收益率及其波动率之间的相关性,结果表明新会计准则实施以来公允价值变动损益与股价收益率显著正相关,而于收益率的波动显著负相关,进一步表明公允价值变动损益具有信息含量,且并不会增大资本市场的波动风险。     

Dynamic interaction of risk–return trade-offs between oil market and China’s stock market: An analysis from the risk preferences perspective

The risk–return trade-off refers to the compensation required by investors for bearing risks, which can be viewed as the risk preference of investors in a market. The current study investigates the dynamic interdependence of risk–return trade-offs between China’s stock market and the crude oil market from the perspective of risk preference of investors, which is designed to explore the transmission process of investors’ risk preference in both markets. Specifically, this study applies the time-varying parameter GARCH-M model, namely TVP-GARCH-M model, to characterize the time-dependent risk–return trade-offs (investors’ risk preferences) in the crude oil and China’s stock markets, then examines their relationship through Granger causality tests. Results show that a variation in risk preferences of the oil market investors can dramatically cause a variation in risk preferences of the Chinese stock market investors, while the risk preference of investors in the Chinese stock market does not lead to that in the crude oil market, which is in accordance with expectations. The dynamic effect of investors’ risk appetite in the crude oil market is further examined by the TVP-VAR model. The findings of this work suggest that there generally exists a positive impact of investors’ risk preference in the oil market and that the effect is time-varying to a greater degree during the short and medium term. Moreover, responses of the Chinese stock market investors’ risk preference were more significant during the 2008 financial crisis. Additionally, the empirical results remain robust when applying alternative crude oil prices and China’s stock prices.     

Geopolitical risks and stock market dynamics of the BRICS

This paper examines the effect of geopolitical uncertainty on return and volatility dynamics in the BRICS stock markets via nonparametric causality-in-quantiles tests. The effect of geopolitical risks (GPRs) is found to be heterogeneous across the BRICS stock markets, suggesting that news regarding geopolitical tensions do not affect return dynamics in these markets in a uniform way. GPRs are generally found to impact stock market volatility measures rather than returns, and often at return quantiles below the median, indicating the role of GPRs as a driver of bad volatility in these markets. While Russia bears the greatest risk exposure to GPRs in terms of both return and volatility, India is found to be the most resilient BRICS nation in the group. Noting that geopolitical shocks and in particular terrorist incidents are largely unanticipated, our findings underscore the importance of a strong financial sector that can help return the market to stability and an open economy that allows local investors to diversify country-specific risks in their portfolios.     

Duration of UI periods and the perceived threat effect from labour market programmes

In this paper, we study whether the prospect of compulsory programme participation motivates individuals to leave the unemployment insurance (UI) system prior to participation. In some systems, individuals may experience very different risks of enrolment even when they face identical formal rules. If individuals learn that programme enrolment does not deterministically follow regulations, estimated effects based solely on institutional regulations may be downward biased. This means that the true effect of potential enrolment may be underestimated. We analyse data from the Danish labour market which includes information on a series of reforms that have enforced programme participation in return for unemployment benefit entitlement. First, we find that unemployed individuals do indeed have different risk of compulsory enrolment even when regulations indicate that the risk should be identical. Second, we find that individuals do react strongly and significantly to the prospect of programme enrolment. However, since individuals experience different risks of programme enrolment, the resulting response observed in individuals' hazard out of unemployment is also different as the unemployment spell progresses.     

上海股票市场规模效应的实证研究

规模效应是指公司规模与收益率之间存在的反向关系,即小规模公司较大公司而言有着更高的收益率。本文从上海证券市场随机抽取60只股票作为数据样本,对其从2007年1月到2009年6月之间的公司数据进行实证研究,得出上海股市存在着规模效应这一结论。     

Risk reporting and stock return in the UK: Does market competition Matter?

This study examines the extent to which market competition influences risk reporting practice. It also explores how market competition affects the usefulness of risk reporting. The automated textual analysis measures the level of risk reporting [how much to report] and its tone [how it is reported] of UK FTSE 350 firms. The abnormal stock return is used as a proxy for the usefulness of risk reporting. In contrast to the proprietary cost hypothesis, our results indicate that the level of risk reporting is a positive function of market competition. Besides, UK firms are likely to disseminate more (less) negative (positive) news about their risks when market competition increases. However, after examining the informativeness of this reporting, we provide evidence that the level of reported risk information does not significantly enhance the abnormal stock returns of UK firms. Nevertheless, the tone of the reported risks carries incremental information indicative of a firm’s abnormal stock return, especially when market competition decreases. The findings suggest that firms are likely to alleviate their proprietary costs by framing their reporting of risk information in a way that deters potential competitors from entering their market and that market competition diminishes the perceived informativeness of such reporting. The results provide implications for investors as they should not acknowledge the disclosure of higher risk information when asking for more corporate transparency, as it lacks informativeness. Besides, policymakers may impose extra compulsory requirements on the UK firms to avoid reporting overly optimistic risk news to protect investors and avoid the adverse effects of this reporting.     

Factor pricing of cryptocurrencies

In this paper, we study the cryptocurrency pricing factors. We review the literatures which state that the cryptocurrency market is weakly efficient. We use the Fama–MacBeth method to investigate the pricing factors. The classical equity-based risk factors including size, momentum, and value to growth from the Fama–French three factor model are studied. We use crypto-unique coin-to-token as a proxy for value-to-growth. For volatility risk factor category, we investigate realized volatility, skewness and jump. We also investigate liquidity factors including bid–ask, volume growth and Roll’s measure. The macro factors are found not to be an explanatory factor. The attention factor works sometimes. The factor model constructed by the significant factors explain most of the excess return of cryptocurrencies.     

投资者结构模式变迁与市场流动性风险

本文研究了市场流动性风险与投资者结构模式之间的关系。随着机构投资者的不断发展壮大,我国投资者结构模式发生了重要转变,然而新的投资者结构模式下,市场流动性的波动结构是否有所不同？本文以流动性水平变化率为研究对象,构建了包含虚拟变量的TGARCH模型对其波动方程进行拟合,研究发现：机构投资者壮大后市场流动性风险显著降低;机构占主导后市场流动性风险受新信息的影响权重较之前增大,而旧有信息对流动性风险的影响相比以前减小。     

Do the carry trades respond to geopolitical risks? Evidence from BRICS countries

This paper aims to analyze the implications of geopolitical risks on the return and volatility of carry trade transactions in the context of BRICS countries for the period 2006–2020. Fixed effects regressions considering the sample countries as a single portfolio document that geopolitical risks are correlated with volatility, while the results are inconclusive for returns. The non-parametric time-varying coefficients panel data estimations further indicate that the effect of geopolitical risks on carry trade volatility is amplified during the Global Financial Crisis and the post-2016 episode. Moving to the disaggregated data, the time-varying robust Granger causality test of Rossi and Wang (2019) show that geopolitical risks have a significant in-sample predictive power for both carry trade return and volatility during a myriad of sub-periods, which can not be captured by standard constant parameter techniques in the presence of instabilities. Overall, our empirical results suggest that the exposure to geopolitical risks should be taken into account by global investors for risk diversification purposes when entering carry trade positions in BRICS countries.