Finansiella Illusioner : ett test av Stockholmsbörsens effektivitet

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Background: Low Price-Earnings ratio, low Book-to market ratio and low stock prices can give the impression that a stock is “cheap”. Is it through systematic use of these portfolio strategies possible to beat the market index – in other words does financial illusions exist? Purpose: To examine if the Stockholm Stock Exchange is an efficient market. Limitations: The efficiency is tested solely through the chosen portfolio strategies: low Price-Earnings ratio, low Book-to-market ratio and low stock prices. The research only includes stocks listed on the A-, O-, OTC- and Attract40 lists during the period 1998-01-01 to 2001-12-31. Methodology: With CAPM as an equilibrium model we are examining if the P/e, Book-to-market or the stock price portfolios generate systematic overperformance in comparision to the market index SIXRX. Significance tests on the 5 % level have been performed to determine if the returns are significantly separated from zero. Results: We can ...