<p>Background: Studying insider trading is difficult due to its sensitive and delicate</p><p>nature. Therefore it is hard to gauge the extent of such activities.</p><p>This problem has resulted in a fierce debate whether it should be</p><p>prohibited or not. Using a method where the effect on monopolistic</p><p>information usage can be isolated insider trading can be monitored.</p><p>Such an event is a profit warning.</p><p>Purpose: This paper examines whether insider trading exist for companies</p><p>making a profit warning between year 2003 and 2007 on the Stockholm</p><p>Stock Exchange. Furthermore the aim with the study is to contribute</p><p>to the debate on the insider trading legislation.</p><p>Method: The study’s purpose is achieved through an event study studying the</p><p>cumulative abnormal return as well as average daily returns during</p><p>the thirty days preceding the warning for a sample of thirty companies.</p><p>Since profit warnings should be completely random and as such</p><p>almost impossible for the market to know in advance, a significant</p><p>abnormal return can only be explained with insider trading. The abnormal</p><p>returns were calculated using the Capital Asset Pricing Model</p><p>since it is the most widely used model.</p><p>Conclusion: For the chosen time frame, when testing on a 95% significance level,</p><p>the study found a significant abnormal return during the last 10 days</p><p>of the event window but not for the entire period of thirty days. The</p><p>daily average return for the thirty companies were significant for six</p><p>of the thirty days within the event window. Two of them were included</p><p>in the last ten day period with a confirmed significant abnormal</p><p>return which might suggest that on average insider trading tend</p><p>to occur during these days. The other four was discarded due to</p><p>sample issues. Since the study was limited to a period of four years</p><p>extending the results to a period other than tested should be made</p><p>with great care since conditions may differ over time. Concerning the</p><p>current debate on the insider legislation, the findings can be used by</p><p>both sides. Either to argue for a strengthening of the law or to question its existence.</p>

This thesis adopts an option approach to examine the stock price reaction to the stock repurchase announcements for both Exchange-listed and Over-the-Counter-listed companies in Taiwan from August 2000 to June 2009. We modify Ikenberry and Vermaelen's (1996) information-asymmetry-based exchange option hypothesis further into a call option hypothesis to accommodate the unique practice in the Taiwanese stock repurchase program. In addition, we conduct robustness tests by including the variables for both information signaling and free cash flow hypotheses which are supported by prior studies. First, we find positive abnormal returns around announcement day, which is similar to previous study. Second, our cross-sectional results support our call option hypothesis, which predicts that the positive abnormal return is positively related to risk-free interest rate, time to maturity and target buyback share fraction. And the abnormal return is negative to the size and market-to-book value of the announcing firm, which are consistent with the signaling hypothesis. However, we do not find any strong evidence for the free cash flow hypothesis.

Nations have always competed vigorously during the bidding process to host mega sporting events. The selection of the host nation is a much anticipated decision that results in the promotion of a country on a global platform. In this paper, I use a market adjusted return (index) model to conduct an event study in order to examine abnormal returns in the stock market surrounding the selection of a nation for the Summer Olympics and the FIFA World Cup. I also focus specifically on the construction and industrial sectors, as well as analyze the impact of selection on the nation emerging as the runner up in the bidding process. The research finds that the outcome of the selection process is partially anticipated by investors, resulting in a market reaction that does not accurately measure the financial impact of hosting the event. As developing nations have demonstrated an increased interest in the hosting of events over the years, this paper also addresses the resulting policy implications, as well as the opportunity cost and the economic effects of crowding out and substitution.

This paper investigates the European CDS markets response to earnings announcements between the years 2011-2013. Through the use of event study methodology, we investigate if the CDS market reacts to earnings news in terms of abnormal spread changes. Furthermore, by exploring the pre- and post announcement window the study examines the efficiency of the CDS market. The results imply that earnings announcements provide valuable information to the CDS market, with statistically significant results on the 5 % and 10 % significant level for negative and positive news respectively. Additionally, the paper shows that the market has a rather symmetric reaction to negative and positive earnings news since there is no significant difference in effects. The paper further reveals that there is no significant difference in the response between different credit rating groups. In terms of market efficiency, the study cannot confirm that there is anticipation for earnings announcements. The study further shows that there is no post-earnings announcement drift in the CDS market and that the market, overall, is efficient in incorporating the information into the spreads. Finally, a cross-sectional regression analysis confirms that negative earnings surprises are linked to large announcement day reactions, while positive earnings surprises are not.

This dissertation consists of two empirical studies in corporate finance. The first study, The Impact of Acquisitions on the Short-Run Returns to Shareholders and Bondholders, investigates shareholder and bondholder wealth with respect to 310 acquisitions in the UK market between 1994 and 2006. It tests the 3-day and 41-day excess security returns with an event study. The results show positive returns for target shareholders and bondholders, and negative returns for acquirer shareholders and bondholders. Moreover, the tests on value-weighted combined security returns show that stockholders lose, bondholders gain, target firms gain, acquirer firms lose, and shareholders/bondholders of target and acquiring firms as a whole lose. These results support the co-insurance hypothesis, wealth transfer hypothesis, hubris hypothesis, and bond return based on hubris hypothesis, and reject the synergy hypothesis. The univariate and multivariate analyses on the deal characteristics find that target and acquirer stock returns are higher with cash payment, acquirer stock returns are higher in friendly and industry unrelated takeovers, acquirer bond returns are higher in industry related takeovers, target firm share returns are higher when target size is smaller than the acquirer size, target and acquirer stock returns are higher in bull market period, and acquirer bond returns are higher in the bear market period. The second study, A Test of the Partial Adjustment Theory of Leverage Using Leverage Changes Arising from Takeovers, investigates firms’ capital structures by the event of takeovers. It examines 659 US acquiring firms which involved in acquisitions between 1962 and 2001. These acquiring firms’ book leverage ratio deviations are tested in an 11-year window. This result shows that takeovers have significant impact on firms’ book leverage ratios in the announcement year. The trend that firms gradually reverse their actual leverage ratios towards their optimism in the five years after the takeovers supports the dynamic trade-off theory. The partial adjustment models on the speed of adjustment further support the dynamic trade-off theory and reject the alternative capital structure theories. The tests on method of payment and source of fund demonstrate that cash payment and raise of funds are likely to increase firms’ leverage ratios at announcement and to maintain these ratios at a high level in the years after the merger.

The covered warrant market in the UK has gained in popularity over time since first launched in 2002. This has opened up an alternative investment choice which offers derivative securities with a life of typically one to two years. It seems to fulfill many of the functions of a traded options market. Since most research has been focused on options trading, the investigation on covered warrants trading is still very limited. This is also largely due to the lack of readily available data for end-traded covered warrants and the existing covered warrants. A unique set of hand-collected data, supplemented by public and private data from main covered warrants issuer and the financial database are employed, making this thesis possible. The sample periods can be divided into two separate sets. The UK covered warrants trading during the period July 2004 - December 2006 are used to examine the impact of warrant introduction and expiration on the price, volume and volatility of the underlying securities. For the introduction analyses, both the announcement and listing of covered warrants have negative impacts on the price of underlying securities for both call and put features, though the impact of the announcement is more pronounced than that of the listing. These affects are temporary and do not persist much beyond the introduction of the warrants. Negative price impacts of the expiration event are also reported for both call and put covered warrants. However, this study finds no significant impacts on the volume of underlying securities trading from the announcement, listing and expiration of call and put covered warrants. Further evidence indicates an increase in volatility of the underlying securities during the announcement and listing of covered warrants. The results hold true for both call and put warrants cases. On the other hand, a decreasing stock volatility is found as a consequence of the expiration of both call and put covered warrants. The second data set involves the call covered warrants traded in the UK market between April 2007 and December 2008; this was analysed for evidence of the best appropriate covered warrants pricing model. This study suggests default risk as a major concern for the warrant price which is called the Vulnerable warrant price. The reasons behind this arise from concern about the issuer’s creditworthiness due to traders’ fraudulent action and the recent subprime problem, the difficulties of dynamic hedging by issuers because of market imperfections, as well as the no guarantees on covered warrant trading provided by the London Stock Exchange. The most salient findings of the study are the following. The Vulnerable warrant price is generally lower than both the Black-Scholes price and warrant market price throughout the warrant’s lifetime. The evidence suggests an overvalued warrant price in the UK market. Moreover, the in-the-money warrants indicate a higher rate of default in comparison to the out-of-the-money warrants. An additional finding shows that the market becomes aware of the default risk only on a short-term basis. The presentation of negative abnormal returns of both market and the Black-Sholes prices support the assumption that default risk is a relevant factor in pricing the UK covered warrants. These findings add to the literature dealing with the effect of derivatives trading on the underlying securities as well as providing more empirical evidence on a particular covered warrant market. This could be of interest not only for practitioners to widen their investment opportunities but also for regulators to have this as a guideline for their future related policies planning.

Many potential benefits of new product introductions (NPI) have been identified in existing literature, yet there are empirical and theoretical evidence that suggests that such benefits are not assured. Building on the concepts of time compression diseconomies, absorptive capacity, and time diversification, we argue that benefits that a firm derives from introducing new products depend on the process of NPI, which we conceptualize as how and what products are introduced by the firm. We propose that pace, rhythm, and the scope are three important characteristics of the process of NPI that affect firm value. Further, we argue that this effect is moderated by organizational marketing and technological intensities. We use an unbalanced panel dataset of the products introduced by public firms between 1991 and 2015 to investigate the proposed framework in the bio-pharmaceutical industry. We estimate the proposed model using a multilevel modeling framework, accounting for endogeneity, unobserved heterogeneity, and heteroscedasticity. The proposed framework and modeling approach provide empirical support for the role of pace, rhythm and scope of NPI on firm performance, and guide managers on choosing the right growth strategy to improve new product performance.

This thesis deals with the behaviour of stock markets during the period of election process. We focus on the influence of elections to the German Bundestag on stock market performance of the countries allied in Visegrad Group during the reference period 1994-2013 covering six Bundestag elections. Germany is a major export partner for all members of Visegrad Group - the Czech Republic, Hungary, Poland and Slovakia. We examine whether there are abnormal returns on stock markets in Visegrad Group countries around the date of German Bundestag elections. We thus examine if the fact that performance of German economy is important for performance of economies of countries allied in Visegrad Group means that Bundestag elections influences their stock markets. We also analyze the influence of elections to German Bundestag on domestic stock market during the reference period 1961-2013. To measure the effect of elections we employ event study methodology using the mean-adjusted return model to measure normal returns. Our event window consists of 65 trading days around the election day (-15,50). We use the estimation window of 100 days (-150,-51). We assess our main hypothesis for each country around every Bundestag elections in our reference period separately over three event windows and also over eight event...

Within the modern and globally connected business landscape, the information assets of organizations are constantly under attack. As a consequence, protection of these assets is a major challenge. The complexities and vulnerabilities of information systems (ISs) and the increasing risks of failure combined with a growing number of security incidents, prompts these entities to seek guidance from information security management standards. The International Organization of Standardization (ISO) Information Security Management System (ISMS) standard specifies the requirements for establishing, operating, monitoring, and improving an information security management system within the context of an organization's overall business risks. Importantly, this standard is designed to ensure the selection of adequate information security controls for the protection of an organization's information assets and is the only auditable international standard for information security management. The adoption of, and certification against the ISO ISMS standard is a complex process which impacts many different security aspects of organizations and requires significant investments in information security. Although many benefits are associated with the adoption of an information security management standard, organizations are increasingly employing economic measures to evaluate and justify their information security investments. With the growing emphasis on the importance of understanding the economic aspects of information security, this study investigated the economic value of the ISO ISMS standard adoption and certification. The principles of the efficient market hypothesis and the event study methodology were employed to establish whether organizations realized economic gains from obtaining certification against the ISO ISMS standard. The results of this research showed that capital markets did not react to the ISO ISMS certification announcements. Furthermore, the capital market reaction to information security breaches was not different between ISO ISMS certified and non-certified firms. It was concluded that the ISO ISMS certification did not create economic value for the certified firms

[pt] Com o aumento de pequenos investidores no mercado secundário de ações do Brasil, a informação pública ganha cada vez mais peso sobre as expectativas e, conseqüentemente, sobre o valor de determinados papéis negociados neste mercado. Neste contexto, um estudo de eventos pode identificar irregularidades geradas pela imperfeição da disseminação das informações, e seus efeitos no mercado acionário. Este trabalho analisa, através de um estudo de eventos, o impacto de artigos publicados na capa do jornal Valor Econômico sobre a valorização das ações das empresas abordadas. Foi utilizada a comparação das valorizações dos papéis anti e post factum, visando identificar desvios que provem ou não a força das informações publicadas. / [en] With the increase in the number of small investors in the Brazilian stock market, public information increases its influence over expectations and, consequently, over the value of determined stocks traded in this market. In this context, an event study can identify irregularities caused by imperfections in the dissemination of information, and their effects on the stock market. This project analyzes, using an event study, the impact of articles published on the front page of the Valor Econômico newspaper on the value of the stocks involved in those articles. The comparison of the returns of those stocks before and after the event was performed, aiming at identifying biases that could demonstrate or not the strength of the information issued.