I conduct an exploratory study about the feasibility of factor timing in the Chinese stock market, covering 24 representative and well-identiffed risk factors in ten categories from the literature. The long-short portfolio of short-term reversal exhibits strong and statistically signiffcant out-of-sample predictability, which is robust across various models and all types of predictors. However, such results are not evident in the prediction of all other factors’ long-short portfolios, as well as all factors’ long-wing and short-wing portfolios. The high exposure to the market beta, together with the unpredictability of the market return, explains these failures to some degree. On the other hand, a simple investment strategy based on predicted returns of the reversal factor’s long-short portfolio obtains a signiffcant return three times higher than the simple buy-and-hold strategy in the sample period, with a signiffcant annualized 20.4% CH-3 alpha.

The general financial theory predicts a carbon premium, as brown stocks bear greater uncertainty under climate transition. However, a contrary green premium has been identified in China, as evidenced by the return spread between green and brown sectors. The aggregated climate transition sentiment, measured from news data using a large language model, explains 12%-33% of the variability in the anomalous alpha. This factor intensifies after China announced its national commitments. The sentiment-driven green premium is attributed to speculative trading by retail investors targeting green “concept stocks.” Additionally, the discussion highlights the advantages of large language models over lexicon-based sentiment analysis.

We examine the performance of actively managed Chinese mutual Funds over the period 2002-2020. Using the bootstrap-based false discovery technique, we find that 19.25% of Chinese actively managed mutual funds produce positive-alpha, which contrasts with existing studies documented by others in developed markets. Our findings survive a battery of robustness tests. Unlike in developed markets, equilibrium accounting may not hold in China as the Chinese stock market is dominated by retail investors instead of mutual funds, and thus the mutual funds in China can be more skilled at the expense of the retail investors. We find supportive evidence of the applicability of the bootstrap-based false discovery rate method by conducting simulations.

Exploiting ffnancial news stories data, we construct news-implied linkages and document a strong lead-lag effect of ffrms with shared news coverage in China’s stockmarket. The news-link momentum strategy generates a monthly return of 1.33% and a four-factor alpha (Liu et al., 2019) of 1.43%. While prior evidence on the attention dynamics among ffrms with joint news coverage is limited, we show that the momentum spillover of news-linked ffrms is largely driven by investor underreaction. The return predictability from news links is also robust to controlling for alternative economic linkages. The ffndings suggest that information diffuses sluggishly among news-connected ffrms, thereby providing new evidence on the implication of media coverage for pricing efffciency.

Research into asset pricing anomalies in the China A-share market is hampered given the short time series of available returns. Even when average excess returns on candidate factor portfolios are economically sizeable, conventional portfolio sorting methods lack statistical power. We apply an efficient sorting procedure that combines firm characteristics with the covariance matrix. For the China A-share market, we find that the efficient sorting procedure doubles the t-statistics compared to conventional portfolio sorts, leading to nine instead of three significant anomalies over the postreform period from 2008 to 2020. We find significant size, value, low-risk, and returns-based anomalies. While portfolio characteristics differ between sorting methods, we find that efficient sorting portfolios highly correlate with equally weighted portfolios and capture the same underlying anomaly.

We examine the information content of changes in shareholdings after private issuance of public equity (PIPE) by mutual funds that participate in PIPEs in China. The results show that the changes in shareholdings is positively related to alpha and cumulative abnormal return (CAR) for PIPE issuers with high information asymmetry, suggesting that the participating mutual funds have superior information. These results are robust after controlling for investment skill, geographic location, and alumni relation. The positive relation between shareholding change and information content is driven by PIPE issuers with weaker corporate governance. In addition, the positive relation is stronger when the placement discount is lower. These results are consistent with a hypothesis that controlling shareholders/management in Chinese PIPE firms may collude with mutual funds to do tunneling.

随着“互联网+”成为国家战略，公募基金行业迎来了爆发性增长，截止到2016年9月底，我国境内共有公募基金管理公司107家，基金总数达到3415支，资产达到8.83万亿元。“互联网+”基金作为新兴事物，既很大程度上推动了基金行业的发展，又为基金行业提供了基于行为金融学理论的新的投资思路。对互联网+基金的绩效评价重要性日益凸显。 运用绝对收益指标和多种风险调整后的收益指标、CAPM单因素模型、Fama-French三因素模型、Carhart四因素模型进行业绩归因分析，重点考察了由大数据因子产生的超额Aalpha情况，并针对实证结果从行为金融学的角度开展分析，在一定程度上填补了目前“互联网+”基金绩效评价的空白。 研究结果表明，2014年6月16日至2016年9月30日，“互联网+”股票型基金的绝对收益率要优于比较组，风险收益和波动率弱于比较组；通过CAPM、Fama-French三因子模型、Carhart四因素模型，超额收益显著优于比较组。同时，基金所依托的不同互联网数据平台，对投资风格也有所影响。

The adequate evaluation of mutual fund performance and of the fund managers’ ability to add value is an issue to which it has been given special attention in the recent financial literature. One of the traditional evaluation measures most commonly used is Carhart's alpha. However, one of the main problems of the evaluation methods that use the beta of the portfolios as a measure of risk and, therefore, Carhart's alpha is its sensitivity to the definition of the market portfolio. In this work we study the importance of defining the market portfolio using Carhart's alpha for a sample of UK mutual funds, and the influence of this market portfolio in the funds´ excess returns and in the performance ranking classification of the fund sample.

Using data on stock trading and accounting information from 2000 to 2018, we construct 426 anomalies and propose the multiple hurdle of 2.85 in the Chinese A-share stock market. With single sort portfolio analysis on value-weighted returns, we find that 98 (27) anomalies have significant raw returns at the 5% level with absolute t-value larger than 1.96 (2.85). After risk adjustment using the Liu, Stambaugh and Yuan (2019) three-factor model, 16 (2) anomalies have significant alphas for single (multiple) tests, about half of which are based on liquidity information, while alphas for accounting anomalies are less significant. After regressing on the four-factor model with turnover, the liquidity anomalies become insignificant. We construct the composite anomalies, and find that the majority can pass the multiple test hurdle.

Efficient portfolio is a portfolio that yields maximum expected return given a level of risk or has minimum level of risk given a level of expected return.However,the optimal portfolios seem not being as efficient as intended.Especially during financial crisis period.optimal portfolio is not an optimal investment as it does not yield maximum return given a specific level of risk,vice and versa.One possible explanion for an unimpressive performance of the seemingly efficient portfolio is incorrectness in parameter estimates called"estimation risk in parameter estimates".Five different estimating strategies are employed to explore ex post portfolio performance when estimation risk is incorporated.These strategies are traditional mean-variance(EV),Adjusted Beta(AB) approach,Capital Asset Pricing Model(CAPM),Single Index Model(SIM), and Single Index Model incorporating shrikage Bayesian factor namely Bayesian Single Index Model(BSIM).Among the five alternative strategies,shrinkage estimators incorporating the single index model outperforms other traditional portfolio selection strategies.Allowing for asset mispricing and applying Bayesian shrinkage adjusted factor to each asset's alpha,a single factor namely excess market return is adequate in alleviating estimation uncertainty. JEL：G320