我国上市公司盈余管理对股价影响的实证分析

盈余管理在西方被称为“市场参与者的游戏”,近年来日益受到我国会计学界的关注。证券市场的迅速发展要求上市公司提供高质量的会计信息,由于盈余管理与会计信息质量关系密切,使得对上市公司盈余管理问题的研究成为投资者、债权人、政府主管部门以及会计准则制定机构关注的重点。另一方面,证券市场经验数据证明,股价的波动也同盈余管理密切相关,而利益相关者很可能利用盈余管理手段来影响股价从而获取利益。因此,加强我国上市公司盈余管理和股价相关性的研究,对提高上市公司会计信息质量和改善证券市场资源优化配置功能有着重要意义。本文运用实证分析方法,选取了竞争性强的家电行业和竞争性弱的石油行业的上市公司,从盈余管理度量着手,研究竞争性不同行业的上市公司盈余管理对股价的影响大小,并对投资者的行为提出相关建议。     

The Empirical Relationship Between Earnings Information and Stock Returns

Abstract:

The objective of this study was to examine, using a vector autoregressive model, whether the difference in earnings growth rates caused different reaction speeds in stock prices. Monthly returns of stocks listed in the Taiwan stock market from May 2003 to April 2013 were used as empirical data in this study. The analytical results showed that the returns of portfolios with higher earnings growth rates significantly led those portfolios with lower earnings growth rates when size, trading volume, institutional ownership ratio, and revenue factors were controlled, respectively. This paper finds that the earnings growth rate is a significant determinant of the lead-lag patterns observed in monthly stock returns.     

UK Stock Returns and the Impact of Domestic Monetary Policy Shocks

Abstract:  We investigate the influence of changes in UK monetary policy on UK stock returns and the possible reasons behind such a response. Firstly, we conduct an event study to assess the impact of unexpected changes in monetary policy on aggregate and sectoral stock returns. The decomposition of unexpected changes in the policy rate is based on futures markets data. Secondly, using a variance decomposition in the spirit of Campbell (1991) we attempt to identity the channels behind the response of stock returns to monetary policy surprises. The variance decomposition results indicate that the monetary policy shock leads to a persistent negative response in terms of future excess returns for a number of sectors.     

Earnings Management and the Long-Run Underperformance of Firms Following Convertible Bond Offers

Abstract:  This paper examines whether the long-run underperformance of convertible bond issuers can be explained by earnings management, as reflected in discretionary current accruals around the time of the offer. Consistent with the earnings management hypothesis, we find that convertible issuers who adjust their discretionary current accruals to report higher net income in the issue year will generally experience inferior operating and stock return performance over the five-year post-issue period. Our findings indicate that there is some temporary overvaluation of convertible issuers by the stock market, but that the resultant disappointed investors will subsequently correct their valuation errors. The similarity of our results to those reported within the prior literature on initial public offers (IPOs) and seasoned equity offers (SEOs) suggests that the earnings management hypothesis is not unique to stock offers, but that it actually extends to convertible bond offers.     

The Impact of Renminbi Appreciation on Stock Prices in China

Since removal of the peg in July 2005, China has entered a new era of a managed floating exchange rate system. Although many observers have raised concerns about the impact of such a policy change on China's trade surplus, less attention has been paid to its effects on financial markets. This paper investigates the impact of recent renminbi appreciation on stock prices in China since removal of the peg, using threshold cointegration and momentum threshold error-correction model (M-TECM). The results clearly illustrate that no short-run causal relation exists, and an asymmetric causal relationship running from the renminbi/U. S. dollar exchange rate to Chinese Shanghai A-share stock prices in the long run is based on M-TECM. Policy and the broader implications of the findings are discussed.     

On the Economic Link Between Asset Prices and Real Activity

Abstract:  This paper presents a model linking two financial markets (stocks and bonds) with real business cycle, in the framework of the Consumption Capital Asset Pricing Model with Generalized Isoelastic Preferences. Besides interest rate term spread, the model includes a new variable to forecast economic activity: stock market term spread. This is the slope of expected stock market returns. The empirical evidence documented in this paper suggests systematic relationships between business cycle's state and the shapes of two yield curves (interest rates and expected stock returns). Results are robust to changes in measures of economic growth, stock prices, interest rates and expectations generating mechanisms.     

The Transitory Nature of Negative Earnings and the Implications for Earnings Prediction and Stock Valuation

The value-irrelevance of losses largely results from the transitory nature of losses and the diminished relationship between current and future earnings. This study develops a sales-based model of future normal earnings that is useful in analyzing future earnings prospects of loss firms. Results indicate that the developed model is associated with future earnings realizations and current stock price and is shown to be incrementally value-relevant (with book value) in price regressions for loss firms. Investigation of the relative valuation role of the prediction model provides evidence that the model is associated with equity value for loss firms expected to survive.     

The Market's Valuation of Fraudulently Reported Earnings

This study examines the market valuation of accounting earnings during the period before it is publicly revealed that the earnings are fraudulent. Using both cross‐sectional and time‐series valuation models, we first find that the market accords less weight to earnings when the accounting numbers are fraudulent. We also show that the market better anticipates the presence of fraud when there is information in the public domain indicating a high ex‐ante risk of fraud. Our findings suggest that investors are able to accurately assess the probability of fraud and that such assessments affect the market's valuation of earnings even before it is publicly announced that fraud has occurred.     

Financial Analysts' Earnings Forecast Dispersion and Intraday Stock Price Variability Around Quarterly Earnings Announcements

This study investigates the relationship between the dispersion of analysts' earnings forecasts and stock price variability around quarterly earnings announcements. Consistent with theoretical predictions, the empirical analysis shows that stock price variability at the time of earnings announcements is positively related to the degree of analysts' predisclosure earnings forecast dispersion. Additionally, firms with high levels of forecast dispersion exhibit significant increases in price variability for longer periods prior to and following earnings announcements than do firms with low levels of forecast dispersion. These results suggest that there is information about the earnings announcement that becomes available to at least a subset of investors prior to the earnings release and that market participants take different amounts of time to process the information conveyed by the earnings announcement.     

股票价格对信贷冲击的动态影响

本文使用基于马尔科夫区制转移方法的协整模型(MS-ECM和MS-VECM),以长期信贷需求方程为基础,研究了我国信贷市场的稳定状态与非稳定状态。实证结果显示:在信贷市场的非稳定状态中,我国股票价格变化对信贷冲击形成了较为明显的动态影响。这种动态影响的出现除了与西方学者所关注的信贷配给效应有关以外,还与信贷资金流入股市有着密切联系。另外,实体经济与信贷的动态互动可以显著增加信贷冲中击的持续性。基于以上结论,本文提出我国应该整合各种监管资源和政策工具,对股票价格变动引起持续性信贷冲击的现象进行动态预防和监控。     

Changes in the Information Efficiency of Stock Prices: Additional Evidence

Previous research shows, using data from three quarters after the implementation of regulation fair disclosure (Reg FD), that there is an improvement in the informational efficiency of stock prices after Reg FD. We compare the informational efficiency of stock prices in four pre-Reg FD quarters (1999–2000) and 12 post-Reg FD quarters (2002–2005). The improvement in the informational efficiency of stock prices previously reported in the immediate aftermath of Reg FD persists in later periods.     

Stock Prices and Inflation: New Evidence from the Pacific-Basin Countries

This paper investigates the statistical relationship between stock prices and inflation in nine countries in the Pacific-Basin. On balance, regression analysis on the nine markets shows negative relationships between stock returns in real terms and inflation in the short run, while co-integration tests on the same markets display a positive relationship between the same variables over the long run. The time path of the response of stock prices plotted against corresponding changes in consumer price indices validates this dichotomy in time-related response patterns of stock prices to inflation; namely, a blip of negative responses at the beginning changes to a positive response over a longer period of time. Stock prices in Asia, like those in the U.S. and Europe, appear to reflect a time-varying memory associated with inflation shocks that make stock portfolios a reasonably good hedge against inflation in the long run.     

The Differences Between Stock Splits and Stock Dividends: Evidence on the Retained Earnings Hypothesis

Abstract:  This paper investigates stock dividends and stock splits on the Copenhagen Stock Exchange (CSE), which is of interest because several of the more recent explanations for a stock market reaction can be ruled out. The main findings are that the announcement effect of stock dividends as well as stock splits is closely related to changes in a firm's payout policy, but that the relationship differs for the two types of events. A stock dividend implies an increase in nominal share capital and hence a decrease in retained earnings. Firms announcing stock dividends finance growth entirely by debt (explaining the need for an increase in nominal share capital) and retained earnings. Basically all firms announcing a stock dividend with a split factor of less than two can also afford to increase their total cash dividends permanently, at least proportionally to the increase in share capital, leading to a significant announcement effect of 4.23%. Firms announcing a stock dividend with a split factor of two or more also increase total cash dividends permanently, but less than proportionally to the increase in share capital. This leads to an insignificant announcement effect of 0.08%. These findings support a retained earnings/signaling hypothesis. For stock splits, no separate announcement effect was found when a firm's payout policy was controlled for. This lends support to the idea that a stock split per se is a cosmetic event on the CSE and is also consistent with the fact that making a stock split on the CSE is virtually cost free.     

Interest Rates and Stock Prices: Evidence from Central and Eastern European Markets

We provide empirical evidence regarding the responses of Central and Eastern European capital markets to monetary policy via domestic and international short-term interest rate shocks. The analysis is conducted using a four-variable structural vector error correction model identified by means of permanent-transitory restrictions. The results indicate a noticeable effect of the international interest rate on stock market indexes in the cases of the Czech Republic, Hungary, Poland, and Romania. Since no monetary policy autonomy exists in Bulgaria, Latvia, and Lithuania, we find support only for the inverse relationship between foreign interest rate and stock index prices.     

基于Copula函数的国际原油价格与股票市场收益的相关性研究

针对国际原油价格与金砖五国股票市场收益之间的相关性问题,使用 AR(p)-GARCH(1,1)-Copula 模型进行检验。运用广义误差分布(GED)获取收益残差序列,对 WTI 原油价格和金砖五国股市收益之间的相关性进行实证分析。研究结果表明,国际原油价格与中国股市收益呈现微弱的相关关系,而与其他四国股市收益的相关关系较为明显。用时变 SJC Copula 模型刻画国际原油价格与金砖五国股票市场收益的相关性最为合适。     

Do Stock Prices of Property Casualty Insurers Fully Reflect Information about Earnings,Accruals, Cash Flows,and Development?

This paper examines whether the stock prices of property and casualty (P&C) insurers fully reflect information contained in earnings, cash flows and accruals, and one particular accrual—development of loss reserves. The reserve for policy losses is a major accrual for P&C firms, requires substantial judgment and is the subject of unique disclosures that reveal the ex post error in management estimates. We find that investors underestimate the persistence of cash flows and overestimate the persistence of accruals for P&C insurers, but our evidence suggests the market does not underestimate the persistence of the development accrual.     

Interest Rate Surprises and Stock Prices

This paper examines the impact of unexpected changes in the federal funds target on stock prices from 1988 to 2001. Measures of interest rate surprises are constructed from survey data and changes in the 3-month T-bill yield. I find that surprises associated with decreases in the target cause stock prices to rise significantly. Surprises associated with increases in the target increase stock market volatility on the announcement day, with volatility reverting to pre-surprise levels on the day after the announcement. This volatility pattern is only evident since 1994. An implication is that concerns about immediate disclosure causing persistent and heightened stock market volatility might be misplaced.     

Stock and Bond Liquidity and its Effect on Prices and Financial Policies

An asset is liquid if it can be traded at the prevailing market price quickly and at low cost. We show that in addition to risk, liquidity affects asset prices and returns. Theories of asset pricing suggest that the expected return of an asset is increasing in its risk, because risk-averse investors require compensation for bearing more risk. Because investors are also averse to the costs of illiquidity and want to be compensated for bearing them, asset returns are increasing in illiquidity. Thus, asset prices should depend on two asset characteristics: risk and liquidity. This paper surveys research on the effects of liquidity on asset prices and returns, showing that liquidity is an important factor in capital asset pricing.     

Income Smoothing, Earnings Quality and Firm Valuation

Abstract:   This study argues that lower variability of earnings does not guarantee income smoothers' higher firm values. Instead, smoothers' earnings should be more value‐relevant if they are of high quality, i.e., earnings quality should be considered simultaneously. Sample firms are divided into four groups: quality earnings smoothers, quality earnings non‐smoothers, non‐quality earnings smoothers, and non‐quality earnings non‐smoothers. Value relevance of reported earnings is then studied using both the levels and the changes approaches with indicator variables. Results show quality earnings smoothers have the highest price‐earnings multiple while non‐quality non‐smoothers have the lowest price‐earnings multiple.