中国股票市场动量投资策略分析

本文通过构造576种动量投资策略,分析中国股票市场动量效应的特征,发现形成期为11个月,持有期为2个月的动量策略可以获得最大的月收益率:1.848%.总体来看,中国股票市场短期(一到三个月)内,动量效应和反转效应都不显著,中长期(三个月到三年)存在显著的动量效应,三年后动量效应基本消失,也不存在反转效应;随着持有期增大,动量收益呈现先增大后减小的趋势.     

中国股票市场动量投资策略分析

本文通过构造576种动量投资策略，分析中国股票市场动量效应的特征，发现形成期为11个月，持有期为2个月的动量策略可以获得最大的月收益率：1．848％。总体来看，中国股票市场短期（一到三个月）内，动量效应和反转效应都不显著，中长期（三个月到三年）存在显著的动量效应，三年后动量效应基本消失，也不存在反转效应；随着持有期增大，动量收益呈现先增大后减小的趋势。     

中国A股市场动量效应的特征和形成机理研究

动量效应不仅是学术研究的热点,而且在实务上也有广泛的应用。长期以来,关于我国股票市场是否存在动量效应一直存在争议,而且现有研究缺乏对动量效应的表现形式、利润来源和形成机理的深入剖析。基于此,文章利用我国A股市场1994-2011年股票收益率数据对动量效应进行了重新检验。结果表明:(1)我国A股市场不存在显著的月度频率上的动量效应,而当形成期为2-4周、持有期为1-3周时则存在稳定的动量收益;(2)规模、账面市值比和行业等因素可以解释约50%的动量收益;(3)现有行为金融理论并不能解释我国动量效应在不同规模、不同账面市值比和不同换手率股票间的显著差异,动量效应在赢家组合和输家组合中具有不同的形成机理。     

基于沪深300行业指数的股市行业动量策略研究

本文选取2002年——2010年沪深300指数以及相应的行业指数作为数据的来源，通过Madab程序实现对行业动量投资策略的研究，得出结论：我国股市存在明显的的短期动量效应，而中长期动量效应不明显。构建评价期和持有期均在4周之内的行业动量策略投资组合可获得显著的正超额收益。     

基于动量和反转的行业配置策略

本文依据中信30个行业分类标准,采用2005年1月7日到2011年4月7日之间的行业指数周涨跌幅对单个行业的动量、反转特征检验表明,不同行业的动量特征可以分为5类,其中股价表现最为活跃、通常是市场涨跌的指示行业,短期动量比较明显,而短期动量均衡和长期动量均衡行业大致对应着周期性行业和非周期性行业,周期性行业的动量通常较短基本在2周左右,而非周期性行业的动量都在8周左右。按照静态时点上测算买入前3位动量或者后3位反转行业的组合效果,可以看到在大部分的期间组合内动量和反转都是有效的,这种策略可以获得正收益;不管是动量策略还是反转策略都更适合短期战术性调整,收益最高都发生在持有期较短的期限内;就特定持有期而言,对应的观察期长短,动量效应在中期内表现较好,在长期内表现较差,而反转效应在长期内表现较好,在中期内表现较差。     

基于沪深300行业指数的股市行业动量策略研究

本文选取2002年-2010年沪深300指数以及相应的行业指教作为数据的来源,通过Matlab程序实现对行业动量投资策略的研究,得出结论:我国股市存在明显的的短期动量效应,而中长期动量效应不明显.构楚评价期和持有期均在4周之内的行业动量策略投资组合可获得显著的正超额收益.     

我国A股市场动量效应实证研究

本文在固定持有期动量策略的基础上,引入了MACD指标构建了随机持有期的动量新策略。运用两个动量策略对沪深A股从1999年1月1日至2013年1月1日有交易数据的股票进行实证检验表明,固定持有期策略下,不存在显著的动量效应。而新策略下平均收益显著为正,动量效应显著。将实证结果同上证指数回归分析表明,系统性风险补偿仅仅解释了部分新策略的收益,这表明,按照本文所构建的新策略进行投资,可以获得显著优于大盘的平均收益,这为我国A股市场量化投资策略提出了有意义的参考。     

中国股市价值反转投资策略有效性实证研究

本文以中国深沪A股股票市场为考察对象 ,分析了价值反转投资策略的有效性。作者通过实证分析发现 :在中国深沪A股股票市场上 ,以帐面价值与市场价值比 (B M)、B M GS等指标构造的价值反转投资策略可以产生显著的超额收益率 ,并且其显著程度因持有期不同而不同。接着 ,作者利用CAPM模型、Fama French三因素模型并引入了协偏度 (coskewness)和协峰度 (cokurtosis) ,构造出多风险因子模型来解释价值反转投资策略超额收益率。我们发现 :在经过传统风险因素调整后 ,价值反转投资策略效果依然明显 ;CAPM模型无法解释价值反转投资策略超额收益率 ;Fama French三因素模型对价值反转投资策略超额收益率的解释能力最为显著 ,但对于有些价值投资策略 ,在Fama French三因素基础上加上协偏度和协峰度因子后 ,模型的解释能力有所提高     

反转效应、负反馈交易与股价波动——基于面板数据的开放式基金投资策略研究

本文利用2002年至2007年基金交易数据,从不同的市场状态、公司规模、买卖股票的基金数量和行业特征等层面深入分析了我国开放式基金的交易策略、影响基金交易策略的因素以及基金交易对于股市波动的影响。实证结果表明：我国开放式基金所投资的股票在中期内并不存在动量效应,相反存在显著的反转效应,基金的投资行为也表现出明显的负反馈交易策略;与前期股票的买入比率相比,股票的收益率以及收益率的波动对基金投资策略的影响更为明显;开放式基金前期的股票交易会加剧当期的股价波动。     

中国股市惯性交易策略的实证研究

本文运用随机占优理论对中国股票市场上的赢家组合、输家组合以及惯性交易策略的有效性进行了实证检验,研究发现在排序期中赢家组合和输家组合的年度收益率分别为48.9%和-39.8%,但持有期的赢家组合和输家组合的年度收益率的绝对值低于排序期,分别为9.76%和-0.89%.运用Barrett-Donald KS的二阶和三阶随机占优检验结果也显示对于不同的样本排序期和持有期,赢家组合确实随机占优于输家组合,从而验证了中国股票市场上"强者恒强、弱者恒弱"的股市定律及"追涨杀跌"交易策略的有效性.     

The Effect of Ex Ante Price on Momentum Profits

We find a strong effect of component stock prices (as of one year before the returns-ranking period) on the magnitude and duration of momentum. Relative strength portfolios formed of high-priced stocks earn statistically significant momentum profits for any holding period in the first three to four years. The effective annual return of the high-priced momentum portfolio for the first year is economically significant at 18.4%, after controlling for the capitalization, trading volume, and unconditional mean effects. This return is considerably higher than the 11.3% earned by low-priced momentum portfolios. Although the price level is correlated with capitalization and trading volume, the price effect is not a mere manifestation of the capitalization and volume effects, as it endures even when the other factors are controlled for. We discuss several implications of our results for the existing behavioral and risk-based explanations of momentum, as none of these models have an explicit role for the price effect.     

A reliable performance measure to differentiate China’s actively managed open-end equity mutual funds

We compare different fund performance measures to examine which performance measures can generate risk-adjusted returns between high ranked and low ranked China’s actively managed open-end equity mutual funds. Our results show that only the six-factor (five factors (market, size, b/m, profitability & Investment facotrs) plus a momentum factor) alpha as the performance measure meets the criteria. Separated by the six-factor alpha, better performing funds have a larger asset under management, a better past 6-month cumulative return, a better stock picking ability, and a higher percentage of hybrid funds. Through our sample period from July 2004 to December 2015, the highest ranked quintile funds generate a monthly risk-adjusted return of 0.24% more than the lowest ranked quintile funds and the six-factor alpha reliably selects a better fund portfolio in both bear and bull markets on the basis of both fund return and holding data. Furthermore, our results from fund trading data show that funds with the highest six-factor alpha rank demonstrate a better trading skill in bear markets, suggesting that those better performing funds exhibit their market timing and stock picking abilities when investors need them most.     

Asymmetric effect of advertising on the Chinese stock market

In this paper, we investigate whether investor attention to advertising has an asymmetric effect on Chinese stock returns by using a multivariate Markov switching model with time-varying regime transition probabilities. Using the Chinese stock market as a setting, we obtain lagged conditional volatility from generalized autoregressive conditional heteroskedasticity (GARCH) for modelling the time-varying transition probabilities of the regime-switching process to capture changes in the market regime. Our evidence documents that the high advertising portfolio does earn higher abnormal return than the low advertising portfolio in low-volatility periods. In high-volatility periods, however, the abnormal return is insignificant when the firm increases advertising spending. Our results support the behavioural model argument that in high-volatility period, advertising information diffuses slowly due to cognitive dissonance. Thus, the effect of advertising on stock returns is asymmetric, and it shows statistical significance in low-volatility periods.     

The relation between asset growth and the cross-section of stock returns: Evidence from the Chinese stock market

This study examines the effect of firm investment on stock returns by using data on the Chinese stock market. We find that stocks with higher investment experience lower future returns and there is an obvious investment effect in the Chinese stock market. The investment effect is stronger for firms that have higher cash flows, lower debt or for state-owned firms. We further explore the relation between investment and returns over the 3 years around portfolio formation. The results show that the high investment firms earn higher returns than low investment firms before portfolio formation; however the high investment firms earn lower returns than low investment firms after portfolio formation, such evidence is supportive of investor's overreaction explanation. Additionally, the stock returns don't necessarily decrease after investment, and the stock returns don't significantly positively correlate with firm profitability or book-to-market, so the result don't support risk-based explanation. Overall, both our portfolio sort and two-stage cross-sectional regression analysis show that behavioral finance theories are better than risk-based theories in explaining the investment anomaly. Evidence from the Chinese stock market provides a useful perspective to understand the debate on the investment anomaly.     

Riding the Wave of Sentiment: An Analysis of Return Consistency as a Predictor of Future Returns

This article analyzes the degree to which return consistency in the past predicts future returns. I show that consistency is a strong predictive measure for future stock returns. In a portfolio context, positively consistent stocks exhibit positive future risk-adjusted returns, and negatively consistent stocks exhibit negative future risk-adjusted returns. The results are economically and statistically significant over multiple subperiods. Also, odd return behavior persists for nearly two years after portfolio formation. Stocks that have been consistently positive (negative) for longer time horizons have higher (lower) risk-adjusted returns during the followingmonththan those thathavebeenconsistent for shorter time periods. Finally, high consistency enhances momentum when the two factors are allowed to interact. Thus, there appears to be strong path dependence in the momentum effect, and consistency in stock returns appears to be an important component of return predictability.     

三种度量基准下的无风险利率实证比较

以上证综指、深圳成指和沪深300指数为研究样本,构建了多因子模型,并利用2003年1月—2009年2月三类指数收益率及各因子的月度数据,用最小二乘法实证反演了上海证券交易市场、深圳证券交易市场以及沪深综合证券交易市场隐含的无风险利率和风险价值。研究发现:股市隐含的风险补偿为负,与传统的风险溢价理论相悖;以短期银行存款利率、7天Shibor利率及7天国债回购利率为度量基准,股市隐含的无风险利率与其存在较大差异,因此在金融衍生品等相关研究中不宜不加选择地将它们作为无风险利率的代理指标。     

景气循环下不动产市场对金融控股 公司股价回报之影响*

本文主要目的在于调查中国台湾地区景气循环变化对于金融产业股价回报的影响,同时引入不动产市场因子进行分析,研究对象将2003年1月至2011年6月中国台湾证券交易市场所有上市银行类股作为研究样本。与过去研究不同,本文进一步划分公司群体为金控与非金控公司进行探讨。实证结果显示在景气扩张时期,因为投资人普遍追求短期房价获利的投机心理,因此,呈现出不动产市场活动效果不显著的现象。反之,在资金成本与房市购买意愿变化下,不动产市场状况与金控公司具有反向的关联。此外,当市场处于景气扩张时期时,金融产业的动量效应较为明显,显现市场投资人较易存在不理性的投资行为,倾向于持有现货进行投机行为,故动量效应在景气扩张时期较衰退时期的效果大。在货币市场方面,当市场处景气扩张时,非金控公司具有负向的利率敏感性,但金控公司则未达统计的显著水平。     

Global idiosyncratic risk moments

We investigate a global cross-sectional relation between idiosyncratic risk moments and expected stock returns by suggesting three global idiosyncratic volatility, skewness, and kurtosis risk factors. We also suggest two global small minus big and high minus low risk proxies for estimating return residuals of the test assets from a global asset pricing model. To perform robustness checks, we suggest other four global risk factors of momentum, leverage, bid-ask spread, and liquidity. We find a significant negative relation between stock portfolio returns and the global moments, and the cross section of stock returns reflects a significant negative price of risk for global idiosyncratic skewness (?0.13%) and idiosyncratic volatility (?1.85%) and a positive and significant price of risk for global idiosyncratic kurtosis. We find that our suggested risk factors are key drivers of risk premia in stock market and are robust to various checks. These factors also can forecast the gross domestic product growth over the sample period.     

Co-movements of Shanghai and New York stock prices by time-varying regressions

We use time-varying regression to model the relationship between returns in the Shanghai and New York stock markets, with possible inclusion of lagged returns. The parameters of the regressions reveal that the effect of current stock return of New York on Shanghai steadily increases after the 1997 Asian financial crisis and turns significantly and persistently positive after 2002 when China entered WTO. The effect of current return of Shanghai on New York also becomes significantly positive and increasing after 2002. The upward trend has been interrupted during the recent global financial crisis, but reaches the level of about 0.4–0.5 in 2010 for both markets. Our results show that China’s stock market has become more and more integrated to the world market in the past twenty years with interruptions occurring during the recent global economic downturn.     

我国证券投资基金持股特征的实证研究

本文使用2002年基金年报中的投资组合数据对2002年末期基金的持股特征进行了实证研究.研究表明,基金的持股比重与股票的每股收益、标准差、股票价格、流通市值、换手率和上市年龄等特征变量具有显著的相关性,通过分析进一步发现基金在2002年末市场低迷的时期十分注重上市公司的业绩、股票的波动性和流动性风险,并且实施价值型投资策略.本文的其它研究结果还表明基金具有较好的识别、挖掘股票价值以及调整投资组合的能力.