Evidence of portuguese stock market abnormal returns

According to the stock market efficiency theory, it is not possible to consistently beat the market. However, technical analysis is more and more spread as an efficient way to achieve abnormal returns. In fact there is evidence that momentum investing strategies provide abnormal returns in different stock markets, Jegadeesh, N. and Titman, S. (1993), George, T. and Hwang, C. (2004) and Du, D. (2009). In this work we study if like other markets, the Portuguese stock market also allows to obtain abnormal returns, using a strategy that consists in picking stocks according to their past performance. Our work confirms the results of Soares, J. and Serra, A. (2005) and Pereira, P. (2009), showing that an investor can get abnormal returns investing in momentum portfolios. The Portuguese stock market evidences momentum returns in short term, exhibiting reversal in long term.

Mergers and acquisitions in the banking sector: An empirical review of the impact of merger announcement on abnormal returns

A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and Economics

Fearful asymmetry: An analysis of pre-earnings abnormal returns

A Work Project, presented as part of the requirements for the Award of a Masters Degree in Finance from the NOVA – School of Business and Economics

The persistence of abnormal returns at industry and firm levels

The present paper proposes a model for the persistence of abnormal returnsboth at firm and industry levels, when longitudinal data for the profitsof firms classiffied as industries are available. The model produces a two-way variance decomposition of abnormal returns: (a) at firm versus industrylevels, and (b) for permanent versus transitory components. This variancedecomposition supplies information on the relative importance of thefundamental components of abnormal returns that have been discussed in theliterature. The model is applied to a Spanish sample of firms, obtainingresults such as: (a) there are significant and permanent differences betweenprofit rates both at industry and firm levels; (b) variation of abnormal returnsat firm level is greater than at industry level; and (c) firm and industry levelsdo not differ significantly regarding rates of convergence of abnormal returns.

Abnormal Returns of Dividend Announcements during a Boom and a Recession. Empirical Evidence from U.S. from the years of 2000 - 2002 and 2005 - 2007, including Finnish Extra Dividends

This study examines the short time price effect of dividend announcements during a boom and a recession. The data being used here is gathered from the years of 2000 - 2002 when it was a recession after the techno bubble burst and from the years 2005 - 2007 when investors experienced large capital gains all around the world. The data consists of dividend increases and intact observations. The aim is to find out differences in abnormal returns between a boom and a recession. Second, the study examines differences between different dividend yield brackets. Third, Finnish extra dividends, mainly being delivered to shareholders in 2004 are included to the empirical test. Generally stated, the aim is to find out do investors respect dividends more during a recession than a boom and can this be proved by using dividend yield brackets. The empirical results from U.S shows that the abnormal returns of dividend increase announcements during the recession in the beginning of this decade were larger than during the boom. Thus, investors seem to respect dividend increases more when stock prices are falling. Substantial abnormal returns of dividend increases during the time period of 2005 - 2007 could not be found. The results from the overall samples state that the abnormal returns during the recession were positively slightly higher than during the boom. No clear and strong evidence was found between different dividend yield brackets. In Finland, there were substantial abnormal returns on the announcement day of the extra dividends. Thus, indicating that investors saw the extra dividends as a good thing for shareholders' value. This paper is mostly in line with the theory that investors respect dividends more during bad times than good times.

Financial Slack and Bidding Firms’ Takeover Announcement Stock Returns – an Event Study

Despite the fact that the literature on mergers and acquisitions is extensive, relatively little effort has been made to examine the relationship between the acquiring firms’ financial slack and short-term post-takeover announcement abnormal stock returns. In this study, the case is made that the financial slack of a firm is not only an outcome of past business and financing activities but it also may affect the quality of acquisition decisions. We will hypothesize that the level of financial slack in a firm is negatively associated with the abnormal returns following acquisition announcements because slack reduces managerial discipline over the use of corporate funds and also because it may give rise to managerial self-serving behavior. In this study, financial slack is measured in terms of three financial statements ratios: leverage ratio, cash and equivalents to total assets ratio and free cash flow to total assets ratio. The data used in this paper is collected from two main sources. A list comprising 90 European acquisition announcements is retrieved from Thomson One Banker database. The stock price data and financial statements information for the respective firms is collected using Datastream. Our empirical analysis is two-fold. First, we conduct a two-sample t-test where we find that the most slack-rich firms experience lower abnormal returns than the most slack-poor firms in the event window [-1, +1], significant at 5% risk level. Second, we perform a cross sectional regression for sample firms using three financial statements ratios to explain cumulative abnormal returns (CAR). We find that leverage shows a statistically significant positive relationship with cumulative abnormal returns in event window [-1; +1] (significance 5%). Moreover, cash to total assets ratio showed a weak negative relationship with CAR (significant at 10%) in event window [-1; +1]. We conclude that our hypothesis for the inverse relationship between slack and abnormal returns receives empirical support. Based on the results of the event study we get empirical support for the hypothesis that the capital markets expect the acquisitions undertaken by slack-rich firms to more likely be driven by managerial self-serving behavior and hubris than do those undertaken by slackpoor firms, signaling possible agency problems and behavioral biases.

Detecting patterns of the spinoff decision of companies and accessing the determination of the abnormal returns

This paper examines value created through spinoffs over a period from 2002-2010. The net debt to average share price ratio and the debt to asset ratio of a company impacts the decision for this restructuring process statistically significant. The announcement of a spinoff yields abnormal returns (AR) for the stockholders of the parent. The relative size of the spin and the financial leverage correlated with the AR positively, whereas the net debt per share and the return on asset negatively. Therefore, no direct wealth transfer from the debt holders of a company to the equity holders can be derived from these results.

Do insiders get abnormal returns? : event studies on the trades of insiders of the firms with differentiated corporate governance of the São Paulo stock exchange

The subject insider trading is controversial. This paper presents series of event studies carried through on the trades with stocks of the firm carried by insiders with the objective to detect abnormal returns, based on the access to privileged information. The sample is composed by trades performed by insiders of the companies with stocks negotiated in the São Paulo Stock Exchange, that are classified as firms with differentiated corporate governance. Indication that trades performed by insiders resulted in abnormal returns compared to the statistically significant expected ones, as in the purchases of common shares; or for selling of preferred stocks.

An empirical investigation of the effect of rights issue announcements on share returns and the determinants of abnormal returns on the Kuala Lumpur Stock Exchange

This thesis examines the effect of rights issue announcements on stock prices by companies listed on the Kuala Lumpur Stock Exchange (KLSE) between 1987 to 1996. The emphasis is to report whether the KLSE is semi strongly efficient with respect to the announcement of rights issues and to check whether the implications of corporate finance theories on the effect of an event can be supported in the context of an emerging market. Once the effect is established, potential determinants of abnormal returns identified by previous empirical work and corporate financial theory are analysed. By examining 70 companies making clean rights issue announcements, this thesis will hopefully shed light on some important issues in long term corporate financing. Event study analysis is used to check on the efficiency of the Malaysian stock market; while cross-sectional regression analysis is executed to identify possible explanators of the rights issue announcements' effect. To ensure the results presented are not contaminated, econometric and statistical issues raised in both analyses have been taken into account. Given the small amount of empirical research conducted in this part of the world, the results of this study will hopefully be of use to investors, security analysts, corporate financial managements, regulators and policy makers as well as those who are interested in capital market based research of an emerging market. It is found that the Malaysian stock market is not semi strongly efficient since there exists a persistent non-zero abnormal return. This finding is not consistent with the hypothesis that security returns adjust rapidly to reflect new information. It may be possible that the result is influenced by the sample, consisting mainly of below average size companies which tend to be thinly traded. Nevertheless, these issues have been addressed. Another important issue which has emerged from the study is that there is some evidence to suggest that insider trading activity existed in this market. In addition to these findings, when the rights issue announcements' effect is compared to the implications of corporate finance theories in predicting the sign of abnormal returns, the signalling model, asymmetric information model, perfect substitution hypothesis and Scholes' information hypothesis cannot be supported.

Tender offers in South America: Are abnormal returns really high?

Diferentes estudios realizados en mercados de capital desarrollados han revelado tasas de retorno positivas inusuales de por lo menos 15% durante la fecha de anuncio de la oferta pública de adquisición de acciones. Aunque casi no se han llevado a cabo estudios sobre los mercados bursátiles en Sudamérica, algunos estudios han reportado tasas de retorno positivas inusuales en un rango del 25% al 50%, las cuales están relacionadas con el anuncio de la primera oferta de adquisición. En el presente estudio, se argumenta que las tasas de retorno positivas inusuales estimadas en los mercados emergentes son altas porque los estudios se han basado en un mercado de capitales totalmente segmentado aplicando el modelo de mercado y utilizando un índice del mercado bursátil local. Al considerar la integración parcial entre los cinco mercados emergentes en Sudamérica, se demuestra que efectivamente existen tasas de retorno positivas inusuales antes, durante y después de la fecha de anuncio de la primera oferta de adquisición. Sin embargo, el retorno positivo inusual asociado a la fecha del anuncio se encuentra en el orden del 8%. Utilizando un modelo de mercado que considere la integración parcial y el riesgo a la baja, se obtiene una tasa de retorno inusual ligeramente mayor. Estos resultados señalan una menor tasa de retorno positiva inusual en la muestra de las empresas sudamericanas incluidas en el estudio.

Reputation and stock abnormal returns

A relação entre reputação organizacional e desempenho nanceiro das empresas tem sido alvo de estudo ao longo dos últimos anos. Empresas com elevados padrões de reputação apresentam maior probabilidade de manter um elevado e sustentado desempenho ao longo do tempo. Seguindo esta linha de pensamento, acionistas que investem em empresas com elevada reputação exigem menos rendibilidades, uma vez que, à partida, o risco a que estão sujeitos é menor. Com o intuito de estudar se empresas com elevada reputação, medida pela presença no ranking de 2015 World's Most Admired Companies da revista Fortune, rejeitam a hipótese das rendibilidades anormais serem iguais a zero, garantindo, por sua vez, um risco inferior, foram utilizados dados em painel que incluem 24,486 observações, entre 26 de dezembro 2014 e 1 de janeiro 2016, de uma amostra total de 462 empresas norte americanas cotadas nos índices bolsistas NYSE e NASDAQ.

Has the time for renewables finally arrived? – An event study on EPA’s Clean Power Plan

The recent proposals presented by EPA aimed to reduce the dependency of fossil fuels and to lower current emissions levels, hoping to gradually shift electric generation units to renewable energy sources. Actually, the Final Rule Proposal announcement day exhibited a negative Abnormal Return on Fossil Fuels but the following days had positive Abnormal Returns, mostly due to legislative change perceived by financial markets which eased up implementation periods of the proposed measures in the Final Rule when compared to the Draft Rule. Oppositely, Renewables and Solar Portfolios exhibited negative Cumulative Abnormal Returns over the period surrounding the Final Rule.

Yritysostojen vaikutus osakkeiden hintoihin metsäteollisuustoimialalla

Tutkimuksen tavoitteena oli selvittää yritysostoilmoitusten vaikutusta ostajayrityksen osakekursseihin ja tutkia kasvattavatko yritysostot ostajayrityksen osakkeenomistajien varallisuutta ylisuurten tuottojen muodossa. Tutkimuksessa tarkasteltiin myös, vaikuttaako ylisuurten tuottojen syntymiseen ostokohteen liiketoimintatyyppi, yritysoston koko tai ostajan oma aikaisempi taloudellinen menestys. Tutkimuskohteena olivat kansainväliset metsäteollisuusyritykset. Tutkimusmenetelmänä käytettiin tapaustutkimusta. Tutkimustulosten mukaan liiketoimintatyypin mukaisesti tarkasteltuna paperin, kartongin ja pehmopaperin valmistajan ostoilmoituksen vaikutuksesta havaintoperiodin kumulatiiviset tuotot olivat ostajayrityksellä positiivisia. Yritysoston koon perusteella tarkasteltuna pienet ostot, joiden suuruus oli alle 10 prosenttia ostajan edellisen vuoden taseesta, olivat ostajan kannalta kannattavia. Yrityksen aikaisemman taloudellisen menestyksen perusteella voidaan todeta, että keskiarvoa paremman velkaantuneisuusasteen ja oman pääoman tuottoprosentin omaavien yritysten kumulatiiviset epänormaalit tuotot olivat yritysostoilmoituksen vaikutuksesta positiivisia ja tilastollisesti merkitseviä.

Osakeanti-ilmoitusten informaatiovaikutus: case Helsingin Arvopaperipörssi 1993 – 2002

Tutkielman päätavoitteena on selvittää, miten osakkeenomistajien merkintäetuoikeuteen perustuva uusmerkintäilmoitus ja suunnattu osakeanti-ilmoitus vaikuttavat osakekursseihin julkistamispäivän ympäristössä. Tutkimusmetodiikka on lähinnä nomoteettinen, vaikkakin tutkimus sisältää myös komparatiivisen tutkimuksen tunnusmerkkejä. Tutkielman empiriaosuudessa tutkitaan merkintäoikeusantien ja suunnattujen osakeantien informaatiovaikutuksia Helsingin Arvopaperipörssissä vuosina 1993 – 2002. Epänormaalit tuotot laskettiin ajanjaksolta t=-15 ja t=15 käyttämällä keskiarvokorjattua mallia ja markkinakorjattua mallia. Merkintäoikeusantien osalta havaittiin positiivisia kumulatiivisia epänormaaleja tuottoja, kun laskentamenetelmänä käytettiin markkinakorjattua mallia. Nämä positiiviset kumulatiiviset epänormaalit tuotot eivät kuitenkaan olleet tilastollisesti merkitseviä. Tutkimuksessa todettiin myös se, että osakemarkkinat eivät reagoi tilastollisesti merkittävästi merkintäoikeusanti-ilmoituspäivänä. Suunnattujen osakeantien osalta havaittiin tilastollisesti merkitseviä (10 % merkitsevyystasolla) negatiivisia kumulatiivisia epänormaaleja tuottoja. Lisäksi todettiin, että osakemarkkinat eivät reagoi tilastollisesti merkittävästi suunnattuna osakeanti-ilmoituspäivänä. Suunnattujen osakeantien osalta havaittiin myös informaation vuotamista markkinoille 11 päivää ennen suunnattua osakeanti-ilmoitusta.

The Impact of a Corporate Name Change on Stock Price and Trading Volume of Canadian Companies

This thesis examines the impact of a corporate name change on stock price and trading volume of Canadian companies around the announcement date, the approval date, and the adoption date over the time period from 1997 to 2011. Name changes are classified into six categories: major and minor, structural and pure, diversified and focused, accompanied with a change in ticker symbol and without a change in ticker symbol, “Gold” name addition and deletion, and different reasons for name changes (e.g., merger and acquisition, change of structure, change of strategy, and better image). The thesis uses the standard event study methodology to perform abnormal return and trading volume analyses. In addition, regression analysis is employed to examine which type of a name change has the largest impact on cumulative abnormal returns. Sample stocks exhibit a significant positive abnormal return one-day prior to the approval day and one day after the adoption date. Around the approval date we observe significant abnormal returns for stocks with a structural name change. On the day after the adoption date we document abnormal returns for stocks with major, minor, structural, pure, focused, and ticker symbol name changes. If a merger or acquisition is the reason for a name change, companies tend to experience a significant positive abnormal return one-day before the approval date and on the adoption date. If a change of structure is the reason for a name change, companies exhibit a significant positive abnormal return on the approval date and a significant negative abnormal return on the adoption date. In case of a change of strategy as the reason for a name change, companies show a significant negative abnormal return around the approval date and a significant positive abnormal return around the adoption date.