管理层持股的治理效应——基于债务期限结构的视角

考虑到中国股市的有效性程度较低及上市公司的股权集中度较高这两个因素,从债务期限结构的角度考察了管理层持股的有效性.研究发现,管理层持股越多,公司债务的期限越短.进一步的分析发现,管理层持股与债务期限结构之间存在的这种负相关关系在高信用等级的企业中表现得更为突出.这表明管理层持股减轻了管理层与股东之间的代理成本,具有一定的治理效应.     

Determinants of Managerial Stock Ownership: The Case of CEOs

Research on the determinants of managerial equity ownership in firms is scant. To a limited extent, prior researchers have examined the variations in insider ownership proportions by combining the officers and directors into one group. This paper differs from earlier studies by focusing on the CEO. The evidence suggests that agency costs, free cash flow, and potential non-diversification losses and CEO attributes are important in explaining variations in CEOs' equity proportions in firms. Specifically, the paper finds that the proportion of CEO's ownership is related positively to the firm's debt level, diversification potential of the firm's common stock, free cash flows, and earnings volatility, and related negatively to the firm size.     

The Effect Of Stock Splits On Liquidity And Excess Returns: Evidence From Shareholder Ownership Composition

We examine the influence of firm ownership composition on both the abnormal returns at the announcement of a stock split and liquidity changes following a stock split. We find three results. First, the largest post‐split increase in institutional ownership occurs for firms that had low institutional ownership before the split. Second, changes in liquidity are negatively related to the level of institutional ownership before the split. Last, the abnormal return following a split is negatively related to the level of institutional ownership before the split. These findings are important as they shed new light on the source of stock split announcement returns.     

Improved Methods for Tests of Long-Run Abnormal Stock Returns

We analyze tests for long-run abnormal returns and document that two approaches yield well-specified test statistics in random samples. The first uses a traditional event study framework and buy-and-hold abnormal returns calculated using carefully constructed reference portfolios. Inference is based on either a skewness-adjusted t -statistic or the empirically generated distribution of long-run abnormal returns. The second approach is based on calculation of mean monthly abnormal returns using calendar-time portfolios and a time-series t -statistic. Though both approaches perform well in random samples, misspecification in nonrandom samples is pervasive. Thus, analysis of long-run abnormal returns is treacherous.     

Managerial Stock Ownership and the Maturity Structure of Corporate Debt

This study documents that managerial stock ownership plays an important role in determining corporate debt maturity. Controlling for previously identified determinants of debt maturity and modeling leverage and debt maturity as jointly endogenous, we document a significant and robust inverse relation between managerial stock ownership and corporate debt maturity. We also show that managerial stock ownership influences the relation between credit quality and debt maturity and between growth opportunities and debt maturity.     

机构持股、特质风险与股票收益的实证研究

机构投资者的投资行为对股票市场的风险与收益产生了极大的影响,机构投资者的大量参与有助于股票市场的稳定、特质风险的分散以及超额收益的减少。文章选取机构投资者持股占股票市值比例这一指标来刻画机构投资者的行为,检验机构持股比例、特质风险和股票收益之间的关系。实证发现,在中国股市,特质风险与股票收益呈显著的正相关关系;机构大量持股有助于降低股票的特质风险;机构投资者持股比例越低的股票,特质风险越大,股票预期收益越高。     

CEO Ownership,Stock Market Performance,and Managerial Discretion

We examine the relationship between CEO ownership and stock market performance. A strategy based on public information about managerial ownership delivers annual abnormal returns of 4% to 10%. The effect is strongest among firms with weak external governance, weak product market competition, and large managerial discretion, suggesting that CEO ownership can reverse the negative impact of weak governance. Furthermore, owner‐CEOs are value increasing: they reduce empire building and run their firms more efficiently. Overall, our findings indicate that the market does not correctly price the incentive effects of managerial ownership, suggesting interesting feedback effects between corporate finance and asset pricing.     

The Effect of Junk Bond Defaults on Common Stock Returns

This paper examines the effect of junk bond defaults on common stock returns. The evidence indicates that stockholders uncover the signs of financial distress long before the default date. Stock prices fall sharply at the time of the default announcement. Although stocks of fallen angel sample recover slowly and steadily after the default announcement, stocks of the original-issue junk bond sample continue to decline. On average, bankrupt firms suffer larger negative stock returns than defaulted firms not only at the time of announcement, but also in both pre- and post-event periods.     

新上市股票异常报酬与经营绩效研究

以1994年到1999年深、沪两市的新上市A股为样本，采用单(配对)样本t-检验、非参数的Wilcoxon配对符秩检验等研究方法，研究了新上市公司股价的异常报酬和财务绩效的关系。研究结果表明新上市公司的股价有短期正异常报酬，而且上市后当年财务经营绩效比上市前要差，上市后第二年财务经营绩效更差。     

Taking Stock: Equity-Based Compensation and the Evolution of Managerial Ownership

We investigate the impact of stock-based compensation on managerial ownership. We find that equity compensation succeeds in increasing incentives of lower-ownership managers, but higher-ownership managers negate much of its impact by selling previously owned shares. When executives exercise options to acquire stock, nearly all of the shares are sold. Our results illuminate dynamic aspects of managerial ownership arising from divergent goals of boards of directors, who use equity compensation for incentives, and managers, who respond by selling shares for diversification. The findings cast doubt on the frequent and important theoretical assumption that managers cannot hedge the risks of these awards.     

The Cross-Section of Stock Returns on The Shanghai Stock Exchange

This study explores the cross-sectional stock return behavior on the A-share market of the Shanghai Stock Exchange (SSE), which is segmented from world's other equity markets. We estimate the effects of beta, firm size, book-to-market equity ratio and a variable unique to the Chinese stock markets, the proportion of firm's floating (tradable) equity over total equity on SSE stocks over the period 1993–2002. We find that smaller firms and value stocks perform better. Systematic risk is negatively significant in down markets. The proportion of floating equity has no direct effect on stock returns. JEL Classification: G14, G15     

Managerial Actions, Stock Returns, and Earnings: The Case of Business-to-Business Internet Firms

In this study we investigate the valuation implications of managerial actions undertaken by 57 Internet firms engaged in Business-to-Business (B2B) e-commerce. We classify 3,007 managerial actions undertaken by our sample firms between the firm's IPO date and September 30, 2000 into nine action categories: (1) acquisition of major customers, (2) introduction of new products and services, (3) promotional and marketing actions, (4) actions taken to address the concerns of stakeholders such as employees and the community at large, (5) announcements of technology, marketing, and distribution alliances, (6) completion of acquisitions, (7) expansion into international markets, (8) management team building actions, and (9) organizational changes.
In the short window tests, we find a significant increase in stock price volatility over a three-day event window surrounding the announcement of almost all actions suggesting that announcement of managerial actions provides value-relevant information to the stock market. In the long window tests, we use factor analysis to group the counts of managerial actions taken by each firm over its post-IPO life into two broad managerial initiatives—market penetration and organization building. These two initiatives explain a substantial portion of the cross-sectional variation in the firms' post-IPO life stock market returns beyond that explained by both reported earnings and analysts' forecasts of future earnings and revenues. Thus, investors appear to supplement relatively meager accounting information with data about the cross-sectional intensity of managerial actions in setting stock prices of B2B Internet firms.     

The Effect of Long-Term Performance Plans on Corporate Sell-Off-Induced Abnormal Returns

This study examines the association between long-term performance plans and wealth effects accruing to stockholders of divesting firms at announcements of sell-off proposals. The results indicate that divesting companies with long-term performance plans experience a more favorable stock market reaction at the announcement of sell-off proposals relative to firms without long-term performance plans. The findings imply that long-term performance plans serve as an effective mechanism to motivate managers to make better decisions.     

The Effect of US Stock Market Uncertainty on Emerging Market Returns

We investigate the effects of US stock market uncertainty (VIX) on the stock returns in Latin America and aggregate emerging markets before, during, and after the financial crisis. We find that increases in VIX lead to significant immediate and delayed declines in emerging market returns in all periods. However, changes in VIX explained a greater percentage of changes in emerging market returns during the financial crisis than in other periods. The higher US stock market uncertainty exerts a much stronger depressing effect on emerging market returns than their own-lagged and regional returns. Our risk transmission model suggests that a heightened US stock market uncertainty lowers emerging market returns by both reducing the mean returns and raising the variance of returns. The VIX fears raise the volatility of emerging market returns through generalized autoregressive conditional heteroskedasticity (GARCH)-type volatility transmission processes.     

Managerial Share Ownership and the Stock Price Effects of Antitakeover Amendment Proposals

Studies that test for an average stock price effect of antitakeover amendments present different results, disagreeing with respect to both the significance and the direction of the effect. This study determines whether effects can be identified when managerial share ownership and amendment type are considered. Results suggest a negative relation between managerial share ownership and the stock price reaction to all but fair price amendment proposals.     

A Dividend Payment Effect in Stock Returns

This paper presents evidence for the period 7/62-12/89 that individual NYSE and AMEX stocks provide relatively high average excess returns on the payment dates of quarterly cash dividends and several subsequent trading days. Additional results indicate that returns during the payment period: (a) are not a manifestation of the January, monthly or dividend yield anomalies; (b) are positively related to the stock's dividend yield; and (c) are higher for firms that have dividend reinvestment plans. These findings are consistent with a tendency by stock-holders to reinvest dividend income into the stock of the paying firm, thereby increasing demand for the stock and raising its price. Additional evidence links the returns on these days with (previously-documented) excess returns around the ex-dividend date.     

赢富数据信息披露对股票收益的影响

本文基于赢富数据所披露的交易信息数据,将样本区间分为六个时间段,比较各个阶段投资者通过利用赢富数据买卖集中度获得收益的能力,来研究股票市场信息环境变化对股票收益的影响.实证结果表明,当股票买入集中度较大时,在初始的五个阶段,市场信息不对称程度的下降降低了股票的信息风险,导致股票收益下降;而在第六个阶段,期望信息风险的增加导致股票的收益较前一阶段有较大提高.而当股票具有较高的卖出集中度时,随着市场信息披露程度的提高,市场对利空信息反映更加敏感.     

The Cross-Section of Expected Stock Returns

Two easily measured variables, size and book-to-market equity, combine to capture the cross-sectional variation in average stock returns associated with market β, size, leverage, book-to-market equity, and earnings-price ratios. Moreover, when the tests allow for variation in β that is unrelated to size, the relation between market β and average return is flat, even when β is the only explanatory variable.