The purpose of the study is to investigate whether insiders generate an Abnormal return compared with other investors on the Swedish Stock Market. This Abnormal return is defined as the cumulative average Abnormal return (CAAR). The other purpose is to investigate whether it would be profitable for ?outsiders? to mimic the transactions of insider trades. The results indicate several significant Abnormal returns on insider trades, especially on buy transactions.

Since the year of 2000 it has been legal for companies in Sweden to repurchases their own stocks. The purpose of this study is to examine if it has been possible to make a positive Abnormal return in Stockholmsbörsen by buying stocks in companies that has announced a buyback program. Our study includes 59 companies that have accomplished a buyback program throw the years of 2000 to 2006. To calculate the Abnormal return we use the BHAR method with Affärsvärldens generalindex and branchindex as benchmarks. The result shows a significant positive Abnormal return of 23,56 percent the first 12 month after the announcement with Affärsvärldens generalindex as benchmark.

Purpose: The main objective of this study is to research whether an announcement of an acquisition generates positive/negative abnormal short-term return towards the buying company?s shareholders. The secondary purpose is to research whether any differences could be due to selected factors: firm size and industry.Method: The study is quantitative in nature where the research aims at the stock price movement around the announcement of an acquisition. The sample size includes 30 companies between the years 2000-2010. The Abnormal return is investigated by an Event Study.Conclusion: Our study shows that the publication gives a positive Abnormal return in comparison to the respective sector indexes.

Purpose: To examine how video-game releases affect the share price, and if video-game reviews have any impact on the share price of gaming corporations. Method: A quantitative deductive research approach is applied with event study methodology used as basis. The investigated companies were the five largest gaming companies listed on the U.S. NASDAQ exchange. A total of 29 video-game launches and 85 reviews where examined.  Theory: The study is based on The Efficient Market Hypothesis, Agent Theory, Public Relations Theory, Nextopia and previous research.Results: The result contains 114 observations in five companies.

The aim with this study is to investigate the market reactions to announcements of special dividends and redemptions in Sweden and thus if these announcements can signal information. This study is an event study, where the event is the day of the announcement of a suggestion regarding issuance of special dividends or redemptions. The Abnormal returns were estimated for two samples with the market adjusted returns model, one including special dividend announcing firms and the other redemption announcing firms. The signalling hypothesis and the hypothesis of a tax induced clientele effect are the most important hypotheses for this study. The efficient market hypothesis is another theoretical base that may explain the market reactions to the studied announcements, especially the pre-announcement activities that may occur.

Question:"Does the market possess perfect information as the efficient market hypothesis says?""Is there any significant relationship between the abnormal stock return on the ex ? day and the dividend?" Purpose: The purpose of this study is to enlighten and find understanding about stock return versus dividend on the ex ? day and try to figure out if Abnormal returns occur on the portfolio during dividends.Methodology:The study was based in a quantitative nature and was derived with an event study and a hypothesis testing. The authors investigated the thirty most traded shares on the Stockholm stock exchange during a period of five years (2005 ? 2009). They were analyzed during a total of nine days; the estimation window was set to sixty days.

Every day a large numbers of transactions occur by people with different backgrounds. Insiders? are a part of them and are considered to have an insight in companies that is not accessible to outsiders. This affects the market conditions for the participants when trading stocks, where individual participants regularly have the possibility to earn Abnormal returns at the expense of others. Although Sweden, Germany and the United States continually keep developing the insider trading regulation, research shows that insiders? still have the ability to earn Abnormal returns.

In light of the current debate on gender equality and behavioral finance, the study aims to describe whether gender differences in financial stock picking can be explained by the different multiples found within the Value Investing Theory. Furthermore, the study aims to determine which of the four portfolios, value, growth, male or female, that has had the strongest return. The results suggest that there is an association between female and value stocks as well as between male and growth stocks. Out of the four portfolios, the value and female portfolio were on average the best performers with Abnormal returns..

This paper examines if trading suspensions on Nasdaq OMX Nordic - Stockholm work as a contributing factor in creating a secure trading. This has been made through an event study and examination of Abnormal returns. Our results for plus tick suspensions indicate that suspensions fulfill their purpose in creating a more secure trading since the trend of Abnormal return we observe prior to a suspension is disrupted. Thus, the suspension is warranted. The conclusion is that the market cannot be completely safe; as the law and practice is structured today an Abnormal return is inevitable.

This paper treats the question about how the internationally established company, Apple, is affected by intern or extern events when it comes to the trade market. The purpose of the study is to investigate if chosen events create Abnormal return on Apples stock market. The chosen research area is Steve Jobs three sick-listings, It-bubble and the purchase of the search engine company Siri. The reason of writing about this is the big interest for the stock market and its function.This study methodological starting position is quantitative done by an event study, with qualitative feature done by an interview with an expertise within this area. When analyzing the empirics, we have used the efficient market theory that says that information should not affect the stock market in the degree that Abnormal return creates.

Purpose: To examine how IR-related press releases affect share price for stock companies, and to explore how said companies practice Investor Relations.Methods: The study was conducted using an event study as well as e-interviews. The event study has a quantitative deductive research approach where the market model is used for calculating the Abnormal return based on press releases. The e-interviews have a qualitative research approach and follow a semi structured interview guide. The study includes all listed stock companies within the Swedish construction industry and includes press releases from the last decade.Theory: The study is based on the efficient market hypothesis and its semi strong form, theories within Investor Relations and previous research.Results: The event study shows a significant negative Abnormal return during a four day period starting the day after the press release event. The negative Abnormal return could derive from investor relations being used by companies as damage control, or that the investors? expectations are too high as a result of IR.

The purpose of this study is to examine the effects of joint venture announcements on stock prices behavior and simultaneously to test the German stock market (Frankfurter Wertpapierbörse) for efficiency. We tried not only to analyze the general impacts of a JV-announcement but also to look for differences in the market response to announcements of different types of joint ventures, namely: domestic, international, horizontal and vertical. Our expectations of efficient market were confirmed during our paper, which employed the technique of the standard event study. The calculation of Abnormal returns which are the signals for market efficiency or inefficiency respectively were based on the market model, establishing linear relationship between the return on the market and the return on an individual security. The parameters of the model were obtained through regression analysis..

Background:It is always fascinating to observe the events that affect the stock market, especially as the numbers of influencing factors are so many and various. Political elections are important events in society and affect the corporate environment in different ways depending on which political party that is in power. This brings up the question of whether political elections are important enough to affect the stock market; and it is this question we intend to analyse in this paper.Purpose:The purpose of this paper is to investigate whether political elections affect the stock market and to discuss the reasons for any possible affect that might be found.Procedure:An appropriate and thoroughly tested method to investigate if an event affects the stock market or not, is to do an event study. Subsequently we chose to do an event study on whether the Swedish general elections in 2002 and 2006 affected the Stockholm Stock Exchange. In order to give the analysis more depth we have also chosen to interview people with knowledge of the stock market.

We acknowledge the lack of empirical studies of the performance of analyst target prices in the Swedish stock market by examining the profitability of target prices for stocks publicly traded on the Stockholm Stock Exchange. We use consensus target prices issued between 2006-2010 and create two different strategies to observe the Abnormal returns generated during this period. Going long in the top decile stocks with the best target prices and going short in the bottom decile stocks with the worst target prices generates a statistically significant abnormal buy-and-hold return of 8.9%. An active strategy with daily portfolio rebalancing and a timely response to target price changes generates a less significant monthly alpha of 1.4% against CAPM. The results show to be robust against the size effect discovered by Fama and French.

This thesis examines underpricing and the long run performance of IPO firms on the Swedish equity market during 1994-2010. We further investigate whether any correlation exist between underpricing and post-IPO performance during 36 months. We use a sample of 80 IPO firms. To examine the aftermarket performance we compare total return of each firm with a matching industry index. In order to strengthen our analysis, we run a second test, comparing actual return for each firm with expected return, adjusted for firm specific risk.