In the aftermath of the verdict of acquittal in “Sweden’s largest insider trading case” once again a debate concerning illegal insider trading has arisen and a lot of criticism is directed towards the laws. The purpose of this master´s thesis is to investigate the occurrence of insider trading and whether or not Swedish legislation has decreased the presence of insider trading on the Stockholm Stock Exchange. For this purpose the legal aspects and relevant arguments are presented and discussed. An event study is performed in order to see if profit warnings show evidence of insider trading on the Swedish stock exchange. The event study show statistically significant evidence of illegal insider trading in 21 out of 44 cases on the Stockholm stock exchange. There is no significant difference in insider trading between profit warnings and reversed profit warnings. The regression show evidence of that the law has had a small negative impact on insider trading in the sample which is surprising and that insider trading is industry correlated. The high frequency of insider trading shows evidence of that the laws are inefficient in stopping insider trading. Since it is clear that the law is seriously flawed in stopping insider trading and that insider trading actually may positively affect the market and its participants, it is argued that it is very questionable if the legislation is necessary and if insider trading should be prohibited at all.

Abstract Though there were many international paper on the European Convertible Bond¡]ECB¡^. Most of them focus on the electronic industry. Financial industry was excluded. A financial holding company made the good use of international source by issuing ECB overseas under the pressure of achieving internationalizes. The purpose of this study is to explore the distinctions of the financial holding companies who have announced issuing European Convertible Bond¡]ECB¡^during 2002 to 2003. To identify the financial character and evaluate the influence on the companies¡¦share price followed by the issuance of ECB from the statistic viewpoint of financial analysis and the dynamic viewpoint of the impacts on the company¡¦s value. There are two parts of the thesis. The first part is about the effect of the financial holding company¡¦s value for their issuing ECB by using the event study. Using probit and logic regression analysis to examine the effect of various financial factors in decision-making process of issuing ECB abroad did the second part. The financial character of financial holding companies with ECB issuance have significant differences in compared to those who have not yet issued ECB. Conclusion: 1.With¡¨Event study¡¨the results shown that there is no significant effect in the short term but cumulative average abnormal return is negative in the long term on the announcement data in exiting shareholders stake of issuing ECB. 2.At 5% significance level¡Aempirical results shown that listed financial holding companies with ECB issuance have significant differences in debt ratio, EPS and firm size compared to the companies who have not yet issued ECB.

This study analyzes 197 companies formed through strategic alliance during the period 1995-2004. There are 107 samples of technological strategic alliance and 90 samples of marketing strategic alliance. The empirical methodology used in this research is the event study approach, which assesses the value implications of the announcement of forming strategic alliance. This study then examines relationships between abnormal returns and relative scale of strategic alliances partners, and profitability of companies through regression analysis to find the following results: 1. The announcement will bring significantly positive abnormal return to the company. 2. Abnormal returns of technological alliance are greater than that of marketing alliance announcements. 3. There is no significant relationship between relative sizes of partners and abnormal returns. Accumulative abnormal returns of relatively larger size partner are higher than relatively smaller size partners. Relatively larger partners in technological alliances gain more benefits in a strategic alliance. 4. The profitability of firms entering strategic alliances is negatively correlated with abnormal returns attributable to alliance announcements. Such a negative correlation is greater for marketing alliances than for technological alliances.

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Abstract Taiwan's stock market have always been ex-dividend Performance , in essence, to participate in ex-dividend will not increase wealth, but investors are usually regarded as dividends paid by companies operating in the future of the expected. Ex-dividend will to come into notice of investor. We collection from 1999 to 2007, total of nine-year period. The ex-dividend day stock prices analysis in Taiwan 50 index stocks. We use market model of Event Study, and respectively studies by OLS¡BGARCH and SUR model, it's estimated that the abnormal return (AR), this paper to discuss ex-dividend performance of the Taiwan50 index stocks. We to join may cause abnormal return of variables to Panel data regression analysis model, the certification may cause abnormal return of factors.

<p>Bakgrund: Det primära syftet med ett kreditbetyg är att tillhandahålla information till kreditgivare och investerare angående ett företags återbetalningsförmåga. Kreditbetyget baseras både på publik och privat information och bör därför vid publicering påverka priserna på både kreditmarknaden samt aktiemarknaden under förutsättning att dessa är semieffektiva marknader.</p><p>Syfte: Syftet är att studera hur aktiekurserna för samtliga företag på Stockholmsbörsen, som erhåller kreditbetyg från S&P, påverkas vid en förändring av företagets kreditbetyg samt outlook.</p><p>Genomförande: Uppsatsens syfte besvaras genom att undersöka aktieavkastningen i samband med publiceringen av ett förändrat kreditbetyg. Vi har använt oss utav en event study för att isolera och testa eventuell abnorm avkastning.</p><p>Slutsatser: Av de totala antal tester som vi har utfört finner vi att endast en bråkdel av dessa är signifikanta på 10 % eller lägre. För att med säkerhet fastställa att ett förändrat kreditbetyg påverkar aktieavkastning hade en signifikant abnorm avkastning på 1 % nivå önskats för en majoritet av testerna. Således finner vi inte några starka bevis för att en förändring av kreditbetyg påverkar aktiekurser på den svenska marknaden. Detta indikerar att de svenska företagen betalar för en tjänst som aktiemarknaden inte värdesätter.</p>

This thesis investigates the economic impact of food safety recalls on the capital share returns of publicly traded meat processing firms using the 2008 Listeria monocytogenes recall in Canada as a case study. The event study method was applied to this study to identify the size, direction and duration of abnormal returns to Maple Leaf Foods Inc. and Premium Brands Holdings which may have resulted from the Listeria recall. Results show that capital share returns to Maple Leaf Foods Inc. and Premium Brands Holdings were negatively impacted by the recall during the event window. Abnormal returns calculated during the post-event window provided evidence that Maple Leaf’s reaction to the announcement may have restored investor confidence in Maple Leaf shares to some degree and that Premium Brands Holdings lack of communication about their meat processing safety protocols may have negatively impacted Premium Brands share returns.

The purpose of this thesis is to further examine the market dynamics of M&amp;As in the cleantech and renewable energy industry. This study analyzes the abnormal returns of 273 announced and 54 completed buyout acquisitions that took place between 1997 and 2014. The event study method is used to test if cleantech deals experience higher returns than traditional energy and mining deals, if deal completions display similar effects as deal announcements (which is the unique contribution of this thesis) and if homogenous deals experience higher abnormal returns than heterogeneous deals. The outcomes are that the traditional energy and mining sector outperforms the cleantech sectors in homogenous deals. That deal completions effect follows the announcements effect for 11 out of 15 groups and that homogenous deals outperform heterogeneous deals.

The purpose of this study is to examine the value generated to shareholders due to the announcement of mergers and acquisitions (M&amp;A) in different industries. Only deals between firms in the OECD member countries over the period 2004-2014 are analysed. The value is measured by calculating the cumulative abnormal return for event periods close to the announcement date. Cumulative abnormal returns is often used for measuring the impact of events on a stock price and reflect what investors believe will be the value from resulting synergies to shareholders. Only transactions between target and acquiring companies that are operating in the industrials, financial services, information technology and consumer staples industry are examined. Previous research is used to determine industry conditions affecting value creation and the expected value creation for each of the four industries is determined. This study find that returns for acquirers are distributed around zero percent. The mean cumulative abnormal returns for acquirers are negative for three of the four industries examined. The only positive abnormal return for acquirers is found in the financial services industry. Target firm shareholders receive positive returns in all industries. Target firm shareholders in the consumer staples and industrials industries receive on average statistically significant results above zero percent for a significance level of 5%. These industries have also the highest target returns.

Due to the rapid evolution of technology, IT software has become incredibly complex. However the human factor still has a very important role on the application of it, since people are responsible to create software. Consequently, software vulnerabilities represent inevitable drawbacks, found to cost extremely large amounts of money to the companies. “Heartbleed” is a recently discovered vulnerability with no prior investigation that answers questions about the impact it has to the companies affected. This paper focuses on the impact of it on the market value of the companies who participated in the vulnerability disclosure process with the help of an event study methodology. Furthermore our analysis investigates if there is a different affection to the value of the company based on the roles those companies had in the process. Our results suggest that the market did not punish the companies about the existence of vulnerability. However the general negative reaction of the market to the incident reflects the importance of a strategic vulnerability disclosure plan for such cases.