Bank Mergers and Insider Nontrading

Insiders with nonpublic information that their firms are acquisition targets can profit by purchasing their firms' stock or by delaying planned sales of their firms' stock. Under current securities laws, insiders who execute the former strategy expose themselves to civil and criminal liability, whereas insiders who execute the latter strategy do not. Using a sample of bank mergers, we find that target bank insiders significantly decrease both share purchases and share sales before merger announcements. These findings suggest that securities laws effectively deter some forms of illegal insider trading and that insiders exploit opportunities to profit legally from nonpublic information.     

浅谈新时期高校教师的职业道德及其建设

当前师德建设中出现的问题,固然有社会不良风气侵蚀等外部的原因,但更值得重视和认识的,是我们自身在工作中存在的问题。文章提出希望宏观决策的领导者能针对教师职业道德和责任感教育中普遍存在的现象和问题,合理、正确地引导行业评价体系,为高校教育乃至教育界建立宽松、和谐、健康的发展环境。     

Investor Attention and Stock Mispricing

This study examines the relation between investor attention and stock mispricing of accruals in U.S. firms using the Limited Investor Attention Model of Hirshleifer and Teoh ( 2003 ). Consistent with the model's hypothesis that investor attention reduces stock mispricing of accruals, I document three key findings. First, I find a significant and negative correlation between stock mispricing of accruals and analyst following. Second, stock mispricing of accruals is negatively correlated with institutional ownership and, in particular, with the ownership of bank trusts and the ownership of pensions and endowments. Third, stock mispricing of accruals is negatively correlated with Big 4 auditor choice.     

Delegated Portfolio Management and Rational Prolonged Mispricing

This paper examines how information becomes reflected in prices when investment decisions are delegated to fund managers whose tenure may be shorter than the time it takes for their private information to become public. We consider a sequence of managers, where each subsequent manager inherits the portfolio of their predecessor. We show that the inherited portfolio distorts the subsequent manager's incentive to trade on long-term information. This allows erroneous past information to persist, causing mispricing similar to a bubble. We investigate the magnitude of the mispricing. In addition, we examine endogenous information quality. In some cases, information quality increases when the manager's expected tenure decreases.     

Mispricing and the cross-section of stock returns

This paper employs the Campbell-Shiller (Rev Financ Stud 1:195–228, 1988) VAR model to derive a model-based mispricing measure that captures investor overreaction to growth. Using this mispricing measure, we find that stocks with low levels of mispricing outperform otherwise similar stocks. The long–short mispricing strategy generates statistically and economically significant returns over the sample period of July 1981 to June 2006. Moreover, this mispricing strategy outperforms the contrarian strategy using various accounting-fundamental-to-price ratios. Our results cast doubt on the risk story in explaining the abnormal returns of the mispricing strategy. Rather, our evidence suggests that asset prices reflect both covariance risk and mispricing.

Investor Sophistication and the Mispricing of Accruals

This paper examines the role of institutional investors in the pricing of accruals. Using Bushee;s (1998) classification of institutional investors, we show that firms with a high level of institutional ownership and a minimum threshold level of active institutional traders have stock prices that more accurately reflect the persistence of accruals. This result holds after controlling for differences in the persistence of accruals between firms with high and low institutional ownership, and after controlling for other characteristics that are correlated with institutional ownership and future returns. Additionally, firms with low institutional ownership are smaller, less profitable, and have lower share turnover, suggesting that limits to arbitrage impede institutional investors from exploiting the seemingly large abnormal returns for these firms.     

并购商誉会影响企业资产误定价吗?

本文利用2007—2018年我国A股非金融上市公司数据,实证检验了并购商誉对企业资产误定价的影响.检验结果表明,并购商誉与资产误定价显著正相关,相比并购商誉中的合理商誉部分,超额商誉与资产误定价正相关关系更为显著;进一步分析显示,后期商誉减值会以加剧股价低估的形式推动资产误定价;机制检验表明,信息不对称和投资者情绪是并购商誉影响资产误定价的中介机制;调节效应表明,并购商誉与资产误定价正相关关系在非四大、分析师关注低和机构投资者持股比例低的分组中更加显著,进而论证了外部审计、分析师关注和机构投资者持股具有积极的治理效应.本文在丰富并购商誉相关研究的同时,也对降低资产误定价进而提高资本市场资源配置效率具有一定的理论和现实意义.     

投资者注意力、应计误定价与盈余操纵

基于应计误定价视角,以投资者认知特征分析为切入点,本文检验了投资者注意力、应计误定价及盈余操纵间的关系。研究发现:(1)投资者注意力具有认知效应,投资者注意力的提高能够显著提高其对盈余构成信息的认知效率,并降低市场中投资者对应计信息的定价高估;(2)投资者注意力具有治理效应,即投资者对股票的充分注意能够显著降低管理层主观的盈余操纵行为。综合而言,投资者注意力具有"认知效应"和"治理效应",投资者注意力调节了投资者的认知效率并提升了对会计盈余构成信息的定价效率,进一步影响了管理层主观的盈余操纵行为。深化投资者注意力的研究具有很高的理论价值和现实意义。     

Pricing and Mispricing Effects of SFAS 131

Abstract:  We investigate the effects of the introduction of Statement of Financial Accounting Standards No. 131 (SFAS 131) on the market's valuation of foreign earnings. Thomas (1999) documents that investors discount the value of foreign earnings for US multinational companies. He conjectures but does not test the possibility that this finding is due to poor disclosure related to foreign operations. We find strong evidence that the introduction of the standard is positively associated with the pricing of foreign earnings. In addition, we use both the Mishkin (1983) test and a zero-investment hedge portfolio test and find that investors' mispricing of foreign earnings lessens (and in fact disappears) after SFAS 131. This study is one of the first attempts to show that improved disclosure reduces mispricing.     

Analyst Disagreement,Mispricing, and Liquidity*

This paper documents a close link between mispricing and liquidity by investigating stocks with high analyst disagreement. Previous research finds that these stocks tend to be overpriced, but that prices correct downwards as uncertainty about earnings is resolved. Our analysis suggests that one reason mispricing has persisted through the years is that analyst disagreement coincides with high trading costs. We also show that in the cross‐section, the less liquid stocks tend to be more severely overpriced. Additionally, increases in aggregate market liquidity accelerate the convergence of prices to fundamentals. As a result, returns of the initially overpriced stocks are negatively correlated with the time series of innovations in aggregate market liquidity.     

Some Tests of APT Mispricing Using Mimicking Portfolios

Cross-sectional and time-series tests using mimicking portfolios are used to assess the exactness of the APT with(out) a residual market factor. The first factor seems to be sufficient to span the efficient set, whether the model is estimated using (un)conditional variance-covariance matrices that are (un)adjusted for nonsynchronous trading. Although the conditional standard deviations of the mimicking portfolios significantly explain the time-variability of security volatilities, the residuals of the mean equation still exhibit heteroskedasticity. Similar results are obtained for portfolios of CAPM-betaranked securities, and for randomly selected individual securities.     

Discussion of “Investor Sophistication and the Mispricing of Accruals”

Collins et al. (2003, this issue) empirically investigate the relation between accruals mispricing and institutional ownership (IO), a proxy for investor sophistication. Their results show that accruals mispricing and IO are negatively correlated; less IO, more accruals mispricing. The authors attribute this differential in accruals mispricing to institutions' superior ability to price accruals either due to superior analytical ability or due to greater access to private information. While the research question is intriguing, a number of methodological limitations may limit the reliability and generality of the findings. In this paper, I discuss these limitations and offer ways of overcoming them, as well as identify a future research avenue in the area of mispricing.     

Mispricing and lasting arbitrage between parallel markets in the Czech Republic

If co-existing parallel markets are efficient, then arbitrage will maintain a correct pricing relationship. A related question is whether two parallel emerging markets offering more or less the same securities but using different institutional designs, can behave as a single, fully integrated market. In this paper an explicit model of price convergence (with transaction costs) is introduced, in which price differences are studied using levels of arbitrage activity. For the empirical analysis two parallel markets in the Czech Republic are used — the Prague Stock Exchange (PSE) and the RMS (over-the-counter system). In particular, the degree of arbitrage activity is studied for different segments of the PSE and the evolution of arbitrage in the early history of these emerging markets. The empirical results provide evidence of market linkage for actively traded stocks. A significant relationship is found between the segment of the market to which a given firm belongs and the estimated level of arbitrage trading. Moreover, the level of arbitrage activity increases over time for all market segments, and as the markets mature, the differences among the segments gradually disappear.     

The Persistence of IPO Mispricing and the Predictive Power of Flipping

This paper examines underwriters' pricing errors and the information content of first-day trading activity in IPOs. We show that first-day winners continue to be winners over the first year, and first-day dogs continue to be relative dogs. Exceptions are "extra-hot" IPOs, which provide the worst future performance. We also demonstrate that large, supposedly informed, traders "flip" IPOs that perform the worst in the future. IPOs with low flipping generate abnormal returns of 1.5 percentage points per month over the first six months beginning on the third day. We show that flipping is predictable and conclude that underwriters' pricing errors are intentional.     

Accounting Measurement Basis, Market Mispricing, and Firm Investment Efficiency

In this paper, we investigate how the accounting measurement basis affects the capital market pricing of a firm's shares, which, in turn, affects the efficiency of the firm's investment decisions. We distinguish two broad bases for accounting measurements: input‐based and output‐based accounting. We argue that the structural difference in the two measurement bases leads to a systematic difference in the efficiency of the investment decisions. In particular, we show that an output‐based measure has a natural advantage in aligning investment incentives because of its comprehensiveness. The (first‐)best investment is achieved when the output‐based measure is noiseless and manipulation free. In addition, under an output‐based measure, more accounting noise/manipulation always leads to more inefficient investment choices. Therefore, if an output‐based accounting measure is highly noisy and easy to manipulate in practice, the induced investment efficiency can be quite low. On the other hand, an input‐based accounting measure, while not as comprehensive, may induce more efficient investment decisions than an output‐based measure if some noise is unavoidable in either measure. The reason is twofold. First, input‐based measures may be associated with less noise and limited manipulation in practice. Second, and more importantly, we show that under an input‐based measure, a slight increase in accounting noise/manipulation may lead to more efficient investment choices. In fact, the (first‐)best result is achieved when the noise/manipulability is small but positive. In other words, for an input‐based measure, being less comprehensive makes small but positive accounting noise/manipulability desirable. Two extensions of the basic model are also explored.     

Mispricing of Research and Development Investments in a Rapidly Emerging and Electronics-Dominated Market

This paper documents prevailing mispricing of research and development (R&D) investments in the Taiwan stock market, a rapidly emerging and electronics-dominated market. Applying stock return data from July 1988 to June 2005, we observe that R&D-intensive stocks tend to outperform stocks with little or no R&D. The R&D-intensity effect cannot be attributed fully to firm size and seasonal effects. The R&D-associated anomaly not only exists but also persists for up to three years. The market apparently undervalues R&D-intensive firms and overvalues non-R&D-intensive firms. Finally, the R&D anomaly is clearer for firms in the electronics industry after 1996.     

Mispricing of dual-class shares: Profit opportunities,arbitrage, and trading

This is the first paper to examine the microstructure of how mispricing is created and resolved. We study dual-class shares with equal cash flow rights and show that a simple trading strategy exploiting gaps between their prices appears to create abnormal profits after transactions costs. Trade and quote data show that investors shift their trading patterns to take advantage of gaps. Contrary to common perception, long–short arbitrage plays a minor part in eliminating gaps, and one-sided trades correct most of them. We also show that the more liquid share class is usually responsible for the price discrepancies.     

实物期权与金融期权比较研究

实物期权与金融期权相比在标的资产的性质、执行价格、有效时间、定价方法、关联性等方面存在差异。     

The Quality Option and Timing Option in Futures Contracts

Often futures contracts contain quality options whereby the short position has the choice of delivering one of an acceptable set of assets. We explore the implications of the quality option on the futures price. We develop a method for pricing the quality option for the general case of n deliverable assets and provide numerical illustrations of its significance. Even when the asset prices are very highly correlated, this option can have nontrivial value, especially when there is a large number of deliverable assets. We analyze the impact of the timing option and its interaction with the quality option. A procedure is developed for valuing the timing option in the presence of the quality option, and some numerical estimates are obtained.     

Expected Option Returns

This paper examines expected option returns in the context of mainstream asset-pricing theory. Under mild assumptions, expected call returns exceed those of the underlying security and increase with the strike price. Likewise, expected put returns are below the risk-free rate and increase with the strike price. S&P index option returns consistently exhibit these characteristics. Under stronger assumptions, expected option returns vary linearly with option betas. However, zero-beta, at-the-money straddle positions produce average losses of approximately three percent per week. This suggests that some additional factor, such as systematic stochastic volatility, is priced in option returns.