机构投资者的交易行为研究:来自中国台湾股市的证据

文章以中国台湾股市为研究对象,主要研究机构投资者的交易行为。文章构建了机构投资者交易不平衡性指标——净交易,在此基础上研究机构投资者的交易行为。研究结果表明:台湾股票市场中以外资和投信基金为代表的金融机构投资者表现为正反馈的交易策略,并且交易的信息含量较高;一般法人的交易表现为负反馈的交易策略,并且交易的信息含量不足;而自营商由于交易动机复杂,交易的信息含量不明确。可见不同的机构投资者的交易行为并不相同。     

The price impact of futures trades and their intraday seasonality

This study examines the price impact of futures trades and their intraday seasonality by analyzing the continuous trading session dataset of KOSPI 200 futures, including the opening and closing periods. For this purpose, the study analyzes the futures dataset that contains information on transaction times, trade directions, order sizes, and the types of investors initiating the transactions. The results suggest several novel findings. First, a substantial portion of the price impact of futures trades is persistent, indicating the presence of informed trading in the futures market. Second, informed trading is concentrated in the opening period and liquidity trading is concentrated in the closing period of the continuous trading session. Third, small trades usually have a greater price impact than large ones, supporting the existence of stealth trading by futures traders. Fourth, trades by institutional investors have a greater price impact than those by individuals, suggesting that institutional investors are better informed and/or more sophisticated than individual investors in the futures market.     

Investor behavior and volatility of futures market: A theory and empirical study based on the OLG model

Investor trading behaviors are always an important issue in behavioral finance and market supervision. This study examines the relationship between investor behavior and future market volatility. We first introduce a two-period OLG model into the futures market, and develop an investor behavior model based on future contract price. We then extend the model to two scenarios: complete and incomplete information. We provide the equilibrium solution, and develop two hypotheses, which are tested with cuprum tick data in Shanghai Futures Exchange (SHFE). Empirical results show that the two-period OLG model for future market is consistent with the market situation in China. More specifically, investors with sufficient information such as institutional investors usually adopt the contrarian trading strategy, whereas investors with insufficient information, e.g., individual investors, usually adopt the momentum trading strategy. These findings reveal that investor behaviors in the Chinese futures market are different from those of in the Chinese stock market.     

Institutional Investors,Earnings Quality and Asset Liquidity: Evidence from China’s Stock Market

This paper investigates how institutional holding and earnings quality influence the liquidity of assets. Contrary to findings in developed markets, we document several novel results in China’s stock market: (1) institutional holding negatively affects assets’ liquidity, (2) earnings quality is negatively related with liquidity. Since earnings quality captures asymmetric information, low earnings quality induces high divergence in investor opinions and thus boosts market trading, and (3) interestingly, the effect of earnings quality on liquidity is greater if institutional investors’ holding is at a high level. Overall, our findings cast doubt on the conventional wisdom that institutional investors and earnings quality improve market liquidity. The results are robust to different measures and alternative model specifications.     

Why and how do foreign institutional investors outperform domestic investors in futures trading: Evidence from Taiwan

A unique data set containing all transactions from the Taiwan Futures Exchange allows us to dissect the long-lasting outperformance of foreign institutional investors in this emerging market. We show that foreign institutional investors comprehensively outperform domestic investors in trade directions, submission types, trading counterparties, order sizes, and order aggressiveness. Although submitting passive orders increases the trading profits of each investor group significantly, particularly for foreign institutions, the most passive domestic trades still lose to the most aggressive foreign institutional trades. We suggest that information advantage plays a more important role than order submission strategy in foreign institutional investors’ superior performance.     

A rare move: The effects of switching from a closing call auction to a continuous trading

This study investigates the effects of switching to a closing continuous trading (CCT) on market quality, while considering the trading behaviors of different types of traders. Investors become more patient in the period preceding the last trading phase, which reduces the bid–ask spread (BAS) in that period. We find an increase in the BAS and volatility during the last trading phase, due to diminishing investor patience. Market volatility and the closing pricing errors relate positively to the trading activities of foreign institutional investors. Overall, the introduction of the CCT worsens the market quality before the closing.     

Disclosure of Downside Risk and Investors' Use of Qualitative Information: Evidence from the IPO Prospectus's Risk Factor Section

I use the context of a company's initial public offering (IPO) of equity securities as a capital‐market setting to empirically study the economic consequences of risk factor disclosures. Using data from Australian IPOs, I examine the relation of textual risk disclosures in the prospectus to initial underpricing. I find that the quantity of disclosures in the risk factor section itself has no significant impact on initial underpricing. However, an increase in the informativeness of risk factor disclosures is associated with lower IPO underpricing. My results suggest that IPOs that provide informative risk factor disclosures have less ex ante uncertainty, in the sense that the disclosures help investors estimate the dispersion of secondary market value. The effect of informative risk factor disclosures on IPO underpricing is more pronounced for IPOs with less prestigious lead underwriters and is mainly driven by younger firms, smaller firms, and firms with poorer operating performance prior to their IPOs. Collectively, my findings suggest that informative disclosures of downside risk are useful for investors to evaluate IPOs.     

Do Private Equity Investors Create Value for Italian Initial Public Offerings?

This study analyses the role of private equity (PE) backing in initial public offerings (IPOs) using a dataset of 227 companies that went public on the Milan Stock Exchange between January 1995 and December 2007. The evidence rejects the certification and monitoring hypotheses and provides considerable support for the market power hypothesis. In accordance with Chemmanur and Loutskina (2006) , we suggest that PE investors exploit their relationships with the key IPO market players to attract attention to the IPOs of firms backed by PE, thus obtaining a higher equity valuation (both in the IPO and in the secondary market).     

On the Demand Elasticity of Initial Public Offerings: An Analysis of Discriminatory Auctions

We analyze 52 Taiwanese IPOs that were introduced through discriminatory auctions (you pay what you bid) between December 1995 and October 1998. The evidence suggests that the elasticity of demand for IPOs in Taiwan through discriminatory auctions is relatively flat. The elasticity is significantly negatively correlated with bidders’heterogeneity, which is consistent with the investor heterogeneity hypothesis. We also find that the average winning bidders earn a significant average abnormal return of 7.83% in the post–IPO market. The post–IPO market abnormal return is positively correlated with the demand elasticity, the idiosyncratic risk of stock returns and the institutional participation rate, and is negatively correlated with the auction clearing price, which is consistent with theory. Finally, there is evidence that informed investors have an incentive to shade their demand for IPOs to avoid the winner’scurse. The most aggressive bidders (the top 5% of the winning bidders) on average incur a small loss of 1.64% (not significant) in the market–adjusted initial returns.     

The Intraday Pattern of Information Asymmetry,Spread, and Depth: Evidence from the NYSE

Studies suggest that investment flows, liquidity imbalances, and institutional trading may create intraday trading patterns and opportunities for investors to time their trades to reduce transaction costs. Motivated by these studies, we divide each trading day into 13 half‐hour trading intervals and measure information asymmetry from price changes, trade sizes, and trade directions. We find that information asymmetry starts high in the morning, drops continuously until it reaches a midday low during Interval 7, rises to a midday high during Interval 10, and drops continuously after. In contrast, neither the spread nor the depth exhibit similar midday extreme values. Essentially, we identify a 90‐min window in the afternoon when net valuable information arrives to the market in high frequency while liquidity is stable, and that may be an opportunity for some investors to time their trades. In addition, we show that market makers employ dynamic strategies that change the spread, the depth, or both to manage information asymmetry. This is particularly evident during the last three trading intervals, where the significant drop in information asymmetry is countered primarily by a significant increase in the depth while the spread is almost constant.     

Efficiency in IPO Issuance Processes?

Is the online auction an efficient mechanism for pricing initial public offerings (IPOs)? Its intent was to minimize first day price surges in IPOs, which represented “money left on the table” for issuers. Evidence from Google's IPO suggests that the online auction process may not have minimized the first day price surge, since 82 percent of the IPOs issued in 2004 using the traditional process experienced less of an increase. Furthermore, a comparison of auction IPOs with traditional IPOs issued in the same year and in the same threedigit SIC code suggests that 44 percent of the auction IPOs have greater first day price surges than their traditional counterparts. A broader comparison of the pricing behavior of auction IPOs with traditional IPOs presents a mixed picture and suggests that the size of underwriter may be an important factor. The mispricing that occurs in auctions may be due to an informational asymmetry on the part of small investors. This informational gap could arise because small investors lack access to the information sources that institutional investors have or because companies are not required to provide detailed information in the online process, inasmuch as they don't undergo the rigorous scrutiny of investment banks in the traditional bookbuilding process. This informational gap may be alleviated by the SEC reforms of the “quiet period” and by the issuer providing more detailed information on the uses of the funds.     

机构投资者类型对股市波动的影响

本文以2007-2010年我国资本市场的整个波动周期为考察期间,在考虑了变量内生性的问题的基础上,采用2SLS方法实证分析了机构整体持股对于股价波动的影响。研究发现:机构整体持股对股市波动的影响因不同的市场状态而具有非对称性,并可以用市场状态假说进行解释;在对于机构分类的实证研究中发现,在控制内生性情况下,同一类别的机构投资者对股市波动的影响是随着市场的变化而变化;同时,即使在相同的市场环境下,不同的投资者对市场波动的影响也不相同。因此,需要辨证认识各类机构投资者的作用,针对不同机构投资者的特征及不同的市场状态采取不同措施以稳定市场。     

Information asymmetry and investor trading behavior around bond rating change announcements

This study examines stock market reactions to public announcements (corporate bond rating changes), including changes in stock prices and investor behavior in terms of trading volumes and patterns. Abnormal returns, abnormal volumes, and net order imbalances are estimated using high-quality stock transaction data from Korean firms, whose bonds were rated by Korea's leading credit rating agencies between 2000 and 2015. We find positive (negative) abnormal stock returns around upgrades (downgrades), although the stock price reactions to downgrades are more statistically significant than those to upgrades. Significant abnormal volumes and order imbalances are found around rating changes, and the extent to which each investor group (domestic individuals, domestic institutions, or foreign investors) reacts to a rating change varies. Our analyses also support that foreign and domestic institutional investors are better informed than individual investors.     

Chinese Traditionality Matters: Effects of Differentiated Empowering Leadership on Followers’ Trust in Leaders and Work Outcomes

Drawing on ethical principles of fairness and integrative social contracts theory, moral obligations of fair dealing exist between the firm and all shareholders. This study investigates empirically whether privileged investors of publicly traded firms engage in legal, but morally questionable, trading that at the expense of non-privileged institutional or atomistic investors. In this context, we define privilege as the access to material, nonpublic earnings surprise information. Our results show that the opportunity for procedural unfairness (e.g., the likelihood of an earnings surprise and information asymmetry) increases with the presence of privileged investors. However, this procedural unfairness does not appear to lead to distributive unfairness even though the level of abnormal trading also increases with the presence of privileged investors. That is, our findings suggest that other shareholders are in fact better off from an outcome perspective given that the abnormal stock price returns upon the announcement of an earnings surprise are either more positive (in response to a favorable surprise) or less negative (in the case of an unfavorable surprise) when the firm has a high proportion of privileged investors. We extract the important implications of our study for future research on the fairness of capital markets and information asymmetry amongst classes of investors, as well as for public policy.     

Foreign portfolio investors before and during a crisis

Using a unique data set, we study the trading behavior of foreign portfolio investors in Korea before and during the currency crisis. The central message is that investors in different categories have different trading patterns. For example, foreign investors outside Korea are more likely to engage in positive feedback trading strategies and are more likely to engage in herding than the branches/subsidiaries of foreign institutions in Korea or foreign individuals living in Korea. This difference in trading behavior is possibly related to the difference in their information. This paper suggests that it may be worth exploring policies that can encourage foreign investors to acquire more information (e.g. by setting up a branch or a subsidiary in the emerging country).     

Informed trading in the index option market: The case of KOSPI 200 options

This study examines if informed trading is present in the index option market by analyzing the KOSPI 200 options, the most actively traded derivative product in the world. The spread decomposition model developed by Madhavan, Richardson, and Roomans (1997) is utilized and the adverse‐selection cost component of the spread estimated by the model is then used as a proxy for the degree of informed trading. We find that adverse‐selection costs constitute a nontrivial portion of the transaction costs in index options trading. Approximately one‐third of the spread can be accounted for by information asymmetry costs. A further analysis indicates that adverse‐selection costs are positively related with option delta. Our regression analysis shows that option‐related variables are significantly associated with estimated information asymmetry costs, even when controlling for proxies for informed trading in the index futures market. Finally, we find the evidence that foreign investors are better informed compared to domestic investors and that domestic institutions have an edge in terms of information over domestic individuals. © 2008 Wiley Periodicals, Inc. Jrl Fut Mark 28:1118–1146, 2008     

我国券商与证券投资基金的惯性反转策略比较研究——基于交易策略弹性指数

为了克服经典GTW模型的缺陷,构造了衡量机构投资者惯性反转策略的指标——"交易策略弹性指数",并以此对中国市场上券商、开放式基金、封闭式基金的行为进行实证研究和比较分析。研究表明,基于股票的当期收益,券商在半数研究期内倾向于采取反转交易策略,而开放式基金和封闭式基金则倾向于采取惯性交易策略,券商可以在一定程度上"中和"开放式基金和封闭式基金行为对市场的影响。     

Institutional Interest,Ownership Type,and Environmental Capital Expenditures: Evidence from the Most Polluting Chinese Listed Firms

This study empirically examines whether firms’ environmental capital expenditures impact institutional investors’ investment decisions in the Chinese market. We particularly examine the impact of ownership type on the relationship of environmental capital expenditures and the behavior of different types of institutional investors by classifying institutional investors into two categories, short-term and long-term investors. In addition, this study further investigates whether environmental capital expenditures related to ownership type increase firm value. We find that long-term institutional investors tend to invest in state-owned firms (SOEs) making environmental capital expenditures. Results also indicate that, with governmental backing and encouragement, the market value of SOEs making more environmental capital expenditures is likely to increase. However, no similar results are found for non-SOEs.     

Institutional Ownership and Private Equity Placements: Evidence from Chinese Listed Firms

This paper examines the impact of institutional ownership on the performance of private equity placements (PEPs) for listed firms in China. We find that the presence of institutional investors can alleviate the information asymmetries between listed firms and the market. The market reaction to PEP announcements is significantly smaller if there is a higher portion of institutional shareholdings. Long‐term firm operational performance after PEPs is positively correlated with institutional shareholdings. Moreover, we find that the relationship between institutional shareholdings and PEP performance is mainly driven by nonlisted corporate investors and mutual funds. Finally, the relationship between PEP performance and institutional shareholdings is stronger in smaller PEP issuers.     

论我国证券交易中投资者的法律地位

我国《证券法》禁止投资者直接进入证券交易市场 ,投资者要在证券交易市场买卖证券 ,需委托证券商进行。由此产生了投资者与证券商法律关系界定问题 ,我国理论界对此问题意见不一。明确投资者与证券商之间法律关系的性质有助于定位投资者的法律地位 ,从而保护投资者的利益 ,实现资本资源的最优化配置 ,维护证券交易市场的稳定。