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The Good and the Bad of Value Investing: Applying a Bayesian Approach to Develop Enhancement Models 价值投资的好与坏:应用贝叶斯方法开发增强模型
Pub Date : 2003-04-26 DOI: 10.2139/ssrn.391686
R. Bird, R. Gerlach
Value investing was first identified by Graham and Dodd in the mid-30's as an effective approach to investing. Under this approach stocks are rated as being cheap or expensive largely based on some valuation multiple such as the stock's price-to-earnings or book-to-market ratio. Numerous studies have found that value investing does perform well across most equity markets but it is also true that over most reasonable time horizons, the majority of value stocks underperform the market. The reason for this is that the poor valuation ratios for many companies are reflective of poor fundamentals that are only worsening. The typical value measures do not provide any insights into those stocks whose performance is likely to mean-revert and those that will continue along their recent downhill path. The hypothesis in this paper is that the value stocks most likely to mean-revert are those that are financially sound. Further, it is proposed that we should be able to gain some insights into the financial strength of the value companies using fundamental accounting data. We apply a Bayesian model averaging approach to a set of fundamental accounting variables to forecast, the probability of each value stock outperforming the market. These probability estimates are then used as the basis for enhancing a value portfolio that has been formed using some valuation multiple. The positive note from our study of the US, UK and Australian equity markets is that it appears that fundamental accounting data can be used to enhance the performance of a value investment strategy. The bad news is that the sources of accounting data that play the greatest role in providing such insights would seem to vary both across time and across markets.
价值投资最初是由格雷厄姆和多德在30年代中期确定的,是一种有效的投资方法。根据这种方法,股票被评为便宜或昂贵的主要依据是一些估值倍数,比如股票的市盈率或账面市值比。许多研究发现,价值投资确实在大多数股票市场表现良好,但在大多数合理的时间范围内,大多数价值股票的表现低于市场也是事实。原因在于,许多公司糟糕的估值比率反映了糟糕的基本面,而基本面只会进一步恶化。典型的价值衡量标准无法提供任何关于那些表现可能回归均值的股票和那些将继续沿着最近的下坡路走下去的股票的见解。本文的假设是最有可能均值回归的价值股是那些财务状况良好的股票。此外,建议我们应该能够利用基本会计数据获得对价值公司财务实力的一些见解。我们将贝叶斯模型平均方法应用于一组基本会计变量来预测,每个价值股票跑赢市场的概率。然后将这些概率估计用作增强使用估值倍数形成的价值投资组合的基础。我们对美国、英国和澳大利亚股市的研究得出的积极结论是,基础会计数据似乎可以用来提高价值投资策略的绩效。坏消息是,在提供这种见解方面发挥最大作用的会计数据来源,似乎在不同的时间和不同的市场都有所不同。
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引用次数: 10
The Effect of Asymmetric Information and Transaction Costs on Asset Pricing: Theory and Test 信息不对称和交易成本对资产定价的影响:理论与检验
Pub Date : 2003-04-21 DOI: 10.2139/ssrn.391682
M. Bellalah, Sofiane Aboura
This paper presents a capital asset pricing model in the presence of asymmetric information and transaction costs. The model is a generalized version of Merton's (1987) model and Black's (1974) model. Empirical tests show a negative relation between the expected rate of return and the shadow costs of incomplete information. The results in this paper have the potential to explain the home bias equity in a domestic and an international context.
本文提出了一个考虑信息不对称和交易成本的资本资产定价模型。该模型是默顿(1987)模型和布莱克(1974)模型的一般化版本。实证检验表明,期望收益率与不完全信息的影子成本呈负相关。本文的结果有可能在国内和国际背景下解释家乡偏见公平。
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引用次数: 10
Are Contrarian Investment Strategies Profitable in the London Stock Exchange? Where Do These Profits Come from? 反向投资策略在伦敦证券交易所盈利吗?这些利润从何而来?
Pub Date : 2003-04-19 DOI: 10.2139/ssrn.391570
Antonios Antoniou, E. Galariotis, S. Spyrou
Given the lack of evidence in the literature regarding UK short-term contrarian profits and their decomposition, this paper investigates the existence of contrarian profits for the London Stock Exchange (LSE), and decomposes them to sources due to common factors and to firm-specific news, building on the methodology of Jegadeesh and Titman (1995). Furthermore, in view of recent evidence that longer-term contrarian profits in the US are explained by firm characteristics such as size and book-to-market equity, the paper decomposes shorter-term contrarian profits to sources similar to the ones in the Fama and French (1996) three-factor model. For the empirical testing, size-sorted sub-samples that are rebalanced annually are used, and in addition, adjustments for infrequent trading and the Bid-Ask bias are made to the data. The results indicate that contrarian strategies are profitable for UK stocks and more pronounced for extreme market capitalization stocks (smallest - largest); the profits persist even after the sample is adjusted for market frictions, such as infrequent trading and bid-ask bias, and irrespective of whether raw or risk-adjusted returns are used to calculate them. Further tests indicate that the magnitude of the contribution of the delayed reactions to contrarian profits is small, while the magnitude of the contribution of investor overreaction to firm-specific information to profits is far larger (consistent with the findings of Jegadeesh and Titman 1995 for the US).
鉴于文献中缺乏关于英国短期反向利润及其分解的证据,本文调查了伦敦证券交易所(LSE)反向利润的存在,并基于Jegadeesh和Titman(1995)的方法,将其分解为共同因素的来源和公司特定的新闻。此外,鉴于最近有证据表明,美国的长期逆向利润可以用公司特征(如规模和账面市值比)来解释,本文将短期逆向利润分解为类似于Fama和French(1996)三因素模型中的来源。对于实证检验,使用每年重新平衡的大小排序子样本,此外,对数据进行了不频繁交易和买卖偏差的调整。结果表明,反向策略对英国股票是有利可图的,对极端市值股票(最小-最大)更为明显;即使在对样本进行了市场摩擦(如交易不频繁和买卖偏差)调整后,利润仍然存在,无论计算时使用的是原始回报还是风险调整回报。进一步的测试表明,延迟反应对逆向利润的贡献幅度很小,而投资者对公司特定信息的过度反应对利润的贡献幅度要大得多(与Jegadeesh和Titman 1995年对美国的研究结果一致)。
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引用次数: 8
Are Credit Scoring Models Sensitive with Respect to Default Definitions? Evidence from the Austrian Market 信用评分模型对默认定义敏感吗?证据来自奥地利市场
Pub Date : 2003-04-01 DOI: 10.2139/ssrn.407709
E. Hayden
In this paper models of default prediction conditional on financial statements of Austrian firms are presented. Apart from giving a discussion on the suggested 65 variables the issue of potential problems in developing rating models is raised and possible solutions are reviewed. A unique data set on credit risk analysis for the Austrian market is constructed and used to derive rating models for three different default definitions, i.e. bankruptcy, restructuring, and delay-in-payment. The models are compared to examine whether the models developed on the tighter default criteria, that are closer to the definition proposed by Basel II, do better in predicting these credit loss events than the model estimated on the traditional and more easily observable default criterion bankruptcy. Several traditional methods to compare rating models are used, but also a rigorous statistical test is discussed and applied. All results lead to the same conclusion that not much prediction power is lost if the bankruptcy model is used to predict the credit loss events of rescheduling and delay-in-payment instead of the alternative models specifically derived for these default definitions. In the light of Basel II this is an interesting result. It implies that traditional credit rating models developed by banks by exclusively relying on bankruptcy as default criterion are not automatically outdated but can be equally powerful in predicting the comprising credit loss events provided in the new Basel capital accord as models estimated on these default criteria.
本文提出了以奥地利企业财务报表为条件的违约预测模型。除了对建议的65个变量进行讨论外,还提出了发展评级模型的潜在问题,并审查了可能的解决办法。构建了奥地利市场信用风险分析的独特数据集,并用于导出三种不同违约定义的评级模型,即破产、重组和延迟付款。将这些模型进行比较,以检验在更严格的违约标准(更接近巴塞尔协议II提出的定义)上开发的模型,是否比在传统的、更容易观察到的违约标准破产上估计的模型在预测这些信用损失事件方面做得更好。采用了几种传统的比较评级模型的方法,但也讨论并应用了严格的统计检验。所有结果都得出了相同的结论,即如果使用破产模型来预测重调度和延迟付款的信用损失事件,而不是针对这些默认定义专门导出的替代模型,则不会损失太多的预测能力。根据巴塞尔协议II,这是一个有趣的结果。这意味着,仅依靠破产作为违约标准的银行开发的传统信用评级模型不会自动过时,而且在预测新巴塞尔资本协议中提供的构成信用损失事件方面,与基于这些违约标准的模型同样强大。
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引用次数: 32
Liquidity Premiums between Treasury Asset Markets 国债资产市场之间的流动性溢价
Pub Date : 2003-03-18 DOI: 10.2139/ssrn.393466
A. Díaz, Eliseo Navarro Arribas
The paper examines the factors which explain the liquidity premium in the Spanish government securitites market. First, we study the degree of liquidity and the relationship to the factors it depends on, observing the differences between two kinds of assets, bills and notes, and between two markets that can be considered as retail market (ETS) and wholesale market (the Bank of Spain's book entry system, MDPA). Our study reveals the conveneince of splitting up the life of bonds into three different stages: Prebenchmark, benchmark and seasoned. Second, we analyse the spreads between yields at which bonds and bills are traded the same day in the ETS and in the MDPA. Liquidity premiums between both markets can be explained by two sorts of variables. There is a set of variables that captures the idiosyncrasy of each issue, mainly the age, and the other set of variables that captures some specific features of the ETS market that may rise to additional liquidity premiums.
本文研究了西班牙政府证券市场流动性溢价的影响因素。首先,我们研究了流动性的程度和它所依赖的因素的关系,观察两种资产,票据和票据之间的差异,以及两个市场之间的差异,可以被认为是零售市场(ETS)和批发市场(西班牙银行的簿记系统,MDPA)。我们的研究揭示了将债券寿命划分为基准前、基准期和成熟期三个不同阶段的便利性。其次,我们分析了当天在ETS和MDPA交易的债券和票据之间的收益率差。两个市场之间的流动性溢价可以用两类变量来解释。有一组变量反映了每只债券的特质,主要是发行年限;另一组变量反映了ETS市场的一些特定特征,这些特征可能会产生额外的流动性溢价。
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引用次数: 1
Analysts' Conflict of Interest and Biases in Earnings Forecasts 分析师在盈利预测中的利益冲突和偏见
Pub Date : 2003-03-01 DOI: 10.2139/ssrn.392004
L. Chan, Jason Karceski, Josef Lakonishok
Analysts' earnings forecasts are influenced by their desire to win investment banking clients. We hypothesize that the equity bull market of the 1990s, along with the boom in investment banking business, exacerbated analysts' conflict of interest and their incentives to adjust strategically forecasts to avoid earnings disappointments. We document shifts in the distribution of earnings surprises, the market's response to surprises and forecast revisions, and in the predictability of non-negative surprises. Further confirmation is based on subsamples where conflicts of interest are more pronounced, including growth stocks and stocks with consecutive non-negative surprises; however shifts are less notable in international markets.
分析师的盈利预测受到他们赢得投行客户愿望的影响。我们假设,20世纪90年代的股市牛市,以及投资银行业务的繁荣,加剧了分析师的利益冲突,以及他们调整战略预测以避免收益令人失望的动机。我们记录了收益意外分布的变化、市场对意外和预测修正的反应,以及非负面意外的可预测性。进一步的确认是基于利益冲突更明显的子样本,包括成长型股票和连续非负意外值的股票;然而,国际市场的变化就不那么明显了。
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引用次数: 178
Market Segmentation and Information Diffusion in China's Stock Markets: Panel Data Unit Root and Cointegration Tests on a and B Share Prices 中国股票市场的市场分割与信息扩散:a股和B股价格的面板数据单位根和协整检验
Pub Date : 2003-03-01 DOI: 10.2139/ssrn.391563
N. Ahlgren, B. Sjöö, Jianhua Zhang
This paper studies market segmentation, information asymmetry and diffusion on the Chinese stock exchanges. Previous studies indicate that the price difference between domestic investors' A shares and foreign investors' B shares are driven by a stochastic trend. In this paper we test the stationarity of the A share price premium, and cointegration between A and B share prices using panel data methods. We use standard Augmented Dickey-Fuller (ADF) unit root tests and likelihood ratio (LR) tests for cointegration for the cross-sectional units or individual firms. Our panel data tests are based on the Fisher (1932) test suggested by Maddala and Wu (1999), i.e. the tests are based on combining the individual p-values from the cross-sectional units or firms. Using panel data, we find that the A share price premium is stationary, and we find cointegration between A and B share prices for most firms, but not for all. A probit model is used to identify the firm characteristics that determine whether A and B share prices cointegrate or not. The results show that cointegration is more likely to be found for firms that have listed their B shares in more recent years, and for firms in the service and manufacturing sectors.
本文研究了中国证券交易所的市场分割、信息不对称和扩散问题。以往的研究表明,境内投资者A股与境外投资者B股的价格差异是受随机趋势驱动的。本文采用面板数据法检验了A股溢价的平稳性,以及A股和B股价格之间的协整性。我们使用标准的增广迪基-富勒(ADF)单位根检验和似然比(LR)检验对横截面单位或个别公司进行协整。我们的面板数据检验基于madala和Wu(1999)提出的Fisher(1932)检验,即检验基于结合来自横截面单位或公司的单个p值。使用面板数据,我们发现A股价格溢价是平稳的,并且我们发现大多数公司A和B股价格之间存在协整,但并非所有公司都存在协整。probit模型用于识别决定A股和B股价格是否协整的企业特征。研究结果显示,对于最近几年上市B股的公司,以及服务业和制造业的公司,协整现象更容易出现。
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引用次数: 9
European Currency Volatility after Economic and Monetary Union 经济与货币联盟后的欧洲货币波动
Pub Date : 2003-01-13 DOI: 10.2139/ssrn.407710
R. Heaney, J. Swieringa
Corporate and institutional foreign exchange market participants are sensitive to the effects of volatility on their day-to-day trading activities and so an important question is whether the introduction of the euro had an impact on foreign exchange rate volatility. Rather than compare individual currencies with the Euro we compare the pre 1999 volatility of three synthetic euro exchange rate series with the volatility of the actual euro starting from the 1st of January 1999. Volatility tests are undertaken within a GARCH framework. There is evidence of a statistically significant increase in transatlantic exchange rate volatility following the introduction of the euro. Acknowledgements: We would like to express our thanks to the staff in the School of Finance and Applied Statistics at the ANU, particularly Dr Chris Bilson for his support and guidance.
企业和机构外汇市场参与者对波动性对其日常交易活动的影响非常敏感,因此一个重要的问题是,欧元的引入是否对汇率波动产生了影响。我们没有将单个货币与欧元进行比较,而是将1999年之前三个综合欧元汇率序列的波动率与1999年1月1日开始的实际欧元波动率进行比较。波动性测试是在GARCH框架内进行的。有证据表明,引入欧元后,跨大西洋汇率波动在统计上显著增加。致谢:我们要感谢澳大利亚国立大学金融与应用统计学院的工作人员,特别是克里斯·比尔森博士的支持和指导。
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引用次数: 1
The Financial Impact of the French Government's Nationalization/Privatization Strategy 法国政府国有化/私有化战略的财政影响
Pub Date : 2003-01-10 DOI: 10.2139/ssrn.393484
C. Laurin, Pascal Dumontier
In 1982, the newly elected French government initiated an unprecedented move by undertaking a massive nationalization plan. This plan involved firms which, at the time, played a crucial role in the French economy. The government's move was short-lived, however, as a program leading to the privatization of some of the firms that had been nationalized in 1982 was initiated in 1986. This paper investigates the value that was created (destroyed) during the nationalization period for each of the French firms nationalized in 1982 and re-privatized between 1986 and 1997. This paper also investigates the extent to which the French citizens registered a gain or a loss as a consequence of the government's nationalization/privatization strategy. Our results show that the French government did not destroy value through the nationalization process. They also show that the French government, and thereby the French citizens, did not register any gain from the nationalization process because of the magnitude of both the premiums paid to shareholders of nationalized firms and the underpricing of shares at the time of privatization.
1982年,新当选的法国政府启动了史无前例的大规模国有化计划。该计划涉及当时在法国经济中发挥关键作用的公司。然而,政府的行动是短暂的,因为导致1982年国有化的一些公司私有化的计划是在1986年启动的。本文研究了1982年国有化、1986年至1997年再私有化的每家法国公司在国有化期间创造(破坏)的价值。本文还调查了法国公民在多大程度上因政府的国有化/私有化战略而登记的收益或损失。我们的研究结果表明,法国政府并没有通过国有化过程破坏价值。他们还表明,法国政府,因此法国公民,没有从国有化过程中获得任何收益,因为支付给国有化公司股东的溢价和私有化时股票的定价过低。
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引用次数: 8
Tax Driven One-Time Dividends and the Managerial Discretion Hypothesis - New Evidence from Germany 税收驱动的一次性股利与管理自由裁量权假说——来自德国的新证据
Pub Date : 2002-12-01 DOI: 10.2139/ssrn.302127
C. Kaserer, Stephanie Roos, E. Wenger
There is an ongoing debate in the literature whether the positive stock price effects to the announcement of a dividend increase or a share repurchase should be explained by the information-signalling hypothesis or the managerial discretion hypothesis of by both of them. We propose a new study where the relevance of the managerial discretion hypothesis in explaining stock market reactions to pay-out announcements could be directly tested. For that purpose we analyse the announcement effects of one-time dividend payments by listed German companies. These dividends were paid in order to realise a tax saving opportunity for the shareholders caused by a revision of the German tax code. As the firms did no have much discretion in timing the disbursement, the event by itself should not have any informational impact. It will be shown that over a period of %B1 3 months around the announcement date the abnormal stock price effect is 3.4 to 4.6 times as high as the mere tax saving effect induced by the one-time dividend payment. Moreover, according to the managerial discretion hypothesis we find the stock price effect to be significantly lower for those companies generating the tax saving without paying out cash to shareholders.
在文献中存在一个持续的争论,即股票价格对股利增加或股票回购的积极影响是否应该由信息信号假设或两者的管理自由裁量权假设来解释。我们提出了一项新的研究,其中管理自由裁量权假设在解释股票市场对支付公告的反应中的相关性可以直接测试。为此,我们分析了德国上市公司一次性派息的公告效应。支付这些股息是为了实现由德国税法修订引起的股东节税机会。由于公司在支付时间上没有太多的自由裁量权,事件本身不应该有任何信息影响。结果表明,在公告日期前后的%B1 3个月期间内,异常股价效应是一次性股息支付引起的单纯税收节省效应的3.4至4.6倍。此外,根据管理自由裁量权假设,我们发现那些产生税收节约而不向股东支付现金的公司的股价效应明显较低。
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引用次数: 4
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EFMA 2003 Helsinki Meetings (Archive)
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