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.

The purpose of our study is to find out if insiders in Sweden generate abnormal earnings through insider trades. We want to pinpoint the cause for abnormal earnings by dividing transactions after company market value, size of the trade and type of insider. A quantitative approach using the market model have been used. We have conducted an event study over two short term event windows. We conclude that insiders in Sweden generate positive abnormal earnings for sales and negative for purchases in our ?long? event window.

This study aims at examining if abnormal returns have existed on theSwedish stock market surrounding the ex-dividend period between the years2002 and 2006. The ex-dividend period that is studied is the ex-dividend dayplus the following five days. The stocks that have been studied are the thirtymost traded stocks which together constitute the index OMXS30.Furthermore, the study investigates if the size of the dividend has an effecton the size of The abnormal returns.Previously performed studies on both the Swedish stock market and foreignstock markets have shown that abnormal returns exist during the ex-dividendperiod. However, the results from these studies are not unambiguous, why itis interesting to follow up these studies with a new study.The method used for investigating the existence of abnormal returns aroundthe ex-dividend period has taken its starting point in the previouslyperformed studies. However, some changes have been made in order tocalculate for differences in risk between different stocks (using beta) whichhas been neglected in the previous studies.The results of our study are that abnormal returns have existed for four outof six days in the ex-dividend period when calculating a mean value over allfive years.

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.

Huvudsyftet med uppsatsen är att se hur ett företags annonsering om återköp av aktier påverkar dess börskurs i Sverige. Som delsyfte kommer även en undersökning göras om huruvida reaktionen skiljer sig mellan olika branscher samt om Sveriges reaktion skiljer sig från den tidigare forskningen i USA och i Storbritannien. Undersökningen har genomförts med hjälp av en eventstudie där den abnormala avkastningen beräknas. En intervju utförs för att bekräfta resultatet.Resultatet gav en sammanlagd kumulativ avkastning på 0,57 %. Det visade även att det finns en skillnad mellan olika branschers reaktion på en annonsering av ett återköp.

Tidigare forskning har indikerat att det kan existera informationsasymmetrier i aktiemarknaden mellan olika marknadsaktörer. Personer med insyn har oftast tillgång till särskild information som inte är tillgänglig för marknaden. Detta innebär att möjligheter till abnormala avkastningar existerar för dessa personer vid handel av bolagets finansiella instrument. Denna studie undersöker i första hand huruvida insynshandel på Aktietorget och Nordic Growth Market genererar abnormal avkastning samt om det föreligger en skillnad i resultat mellan dessa marknadsplatser. Det som ligger till grund för studien är insiders samtliga köp- och säljtransaktioner under 2005 för bolag noterade på Aktietorget och Nordic Growth Market.

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.

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.

A trading halt is a measure conducted by a securities exchange in order to reduce information imbalances between market participants, thus enabling a higher level of market efficiency. A market is said to be efficient when new information concerning a company is instantly reflected in its stock price, implying that abnormal stock returns cannot be systematically achieved in an efficient market. The purpose of this study is to examine the occurrence of abnormal stock returns following trading halts on the Stockholm Stock Exchange. The study is based on a sample of 64 trading halts executed between January 2003 and February 2008. Historical daily prices for stocks subject to trading halts during the period have been gathered from the Datastream Advance database, while information on date and time of trading halts have been collected from the Stockholm Stock Exchange website.

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.

Resultaten visar på att abnormal earnings model är en mertillförlitlig modell i förhållande till dividend growth model. Dettafrämst då abnormal earnings model grundar sig på mer tillgängliginformation samt att tillväxträntan i dividend growth model harkonstaterats vara orealistiskt hög. Analytikers prognoser tenderaratt vara optimistiska i början av undersökningsperioden 2000-2002. Perioden 2003-2007 präglas mer av pessimistiskavinstprognoser. Marknadens riskpremie fluktuerar mindre underperioden 2005-2007, vilket kan förklaras utav införandet av IFRSår 2005..

This paper aims to investigate abnormal returns for rivals to bidder targets in connection with the announcement of the bid. The study is based on 38 bids placed between September 2006 - January 2011 and 137 rival firms listed on Nasdaq OMX Nordic. We measure cumulative abnormal returns, CAR, for rival firms through an event study. We find that rival firms earn significant positive CAR in connection with the announcement of the bid. This is in line with the two-sided signaling effect presented by Akhigbe et al.

Purpose: The purpose of this thesis is to investigate whether abnormal stock returns could be identified as a result of a layoff announcement during weak economy.Method: An event study methodology.Theory: Efficient market hypothesis, signal theory.Empirical results: Quantitative data from observations of stock prices in thirty two companies listed on the Nasdaq OMX Stockholm, in the period 2008 -2012.Conclusion: The results indicate that the market reaction was negative because there were negative abnormal returns on the Stockholm Stock Exchange during the period 2008-2012 in connection with the layoff announcements. The market reaction was milder when staff reductions were carried out as a result of a restructuring and stronger when staff reductions were carried out as part of a cost reduction program.The layoff announcements elicited different market reactions depending on the company's industry affiliation. The most negative reaction was in the Healthcare industry. Negative abnormal returns were lower in industries Industrials, Consumer Services and Consumer Goods. There were no abnormal returns for shares of companies in the industry Financials.

During the years 2005-2007 several cases of abnormal bleeding were seen after surgery in Bengal cats on veterinary clinics and animal hospitals in Sweden. In this study we have examined if the observed bleedings are due to an inherited defect of the coagulation cascade. Ten Bengal cats were tested for activated partial thromboplastin time (P-APT-time) and one-stage protrombin time (P-PK), and nine of these cats were tested for fibrinogen quantity (P-fibrinogen). Four of the tested cats had shown signs of an abnormal bleeding after surgery, and five of the cats were genetically related to these cats. One cat had a small bleeding wound at the internal base of the right auricle.