Överavkastande Aktierekommendationer : En utopi eller en hållbar investeringsstrategi?

Detta är en Magister-uppsats från Högskolan i Jönköping/IHH, Företagsekonomi; Högskolan i Jönköping/IHH, Företagsekonomi


Background: The value of stock recommendations have been debated for a century andthe debate has escalated since Alfred Cowles (1933) published his research in “Can StockMarket Forecasters Forecast”? As of late, savings in stocks has increased and the householdsare managing their savings more actively. The consequence of the increased interestin stocks has resulted in a growing market for stock recommendations. Not just financialmedia but daily newspapers have embraced this new found interest, hence stock recom-mendations can be found in almost all large newspapers in Sweden. Furthermore, this phe-nomenon has also lead to intensified research within stock recommendations. Researchers have under the 20th and 21st century investigated a wide number of issues concerning stock recommendations. The most common issue with different angles has been whether stockrecommendations generate abnormal returns or not? Earlier research on this issue havehowever mostly been based on the American stock market. According to us, not enoughnational research has been done on whether stock recommendations generate abnormal returnsor not on the Swedish stock market. Further we think that there is a lack of research with regards to a short time span.

Purpose: The purpose of the study is to investigate whether stock recommendations on Nasdaq OMXSLarge-Mid-Small CAP, First North and Aktietorget generate abnormal returns? Central for the study is to investigate if stock recommendation generates abnormal returns in the short-term. Secondary the study will also investigate stock recommendations effect on stock prices in the long run.

Method: First step was to create databases from high frequency data, 10 minute OHLCVbars, and from closing prices. Thereafter use these as a base for statistical calculations.

Conclusion: The results from this study show that analysts have succeeded with generat-ing significant abnormal returns with their recommendations. Above all it is the business journals buy recommendations that generate the highest abnormal return. Sell recommen-dations didn’t give high significant results in our measurements. Our results also show thatabnormal returns from buy recommendations are sufficiently high and the transaction costsare sufficiently low so that investors can capitalize on the analyses. We found that buy recommendations effect companies noted on Small Cap etc to a higher extent than companies noted on Large- and Mid-Cap because of the lower degree of transparency in the smaller companies. Our results also indicate that the weekly magazines generate approximatelyequal abnormal returns. The monthly generates the lowest abnormal returns in our study. In our research we also found that buy recommendations that are published when thestock market has a positive momentum perform better than when the stock market has anegative momentum. We also found that investor should closely monitor the information flow before the recommendation is published, since a positive information flow can have afavorable outcome on the size of the abnormal return. Last but not least, we observe a correlationbetween the numbers of investors the recommendation reaches and the magnitudeof the observed abnormal return.

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