Heuristic of Excessive Optimism in Corporate Valuations

Radosław Pastusiak


The main aim of the article is an attempt to show the phenomenon of excessive optimism on capital market on the example of recommendations provided by the Brokerage Houses in Poland. The structure of recommendations indicates that there is more positive recommendations than negative and neutral ones. It would be reasonable statistically in constant market growth conditions, meanwhile, stock market is characterized by bull, bear and horizontal trend periods. The question is, why then, in the changing conjuncture the outweigh of positive recommendation over the negative and neutral ones is observed. To achieve the research aim, the companies from the Warsaw Stock Exchange were selected and recommendations describing them were compared. Research results indicate that positive recommendations are dominant. The next stage was to compare the stock quotation at recommendation issue date with the price achieved by the company a year after. Research results indicate that despite positive and negative recommendations of Brokerage Houses, significant number of recommendations have overestimated the price in relation to real value achieved by the particular company on the Warsaw Stock Exchange.


excessive optimism; valuation of the company; heuristics

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DOI: http://dx.doi.org/10.17951/h.2017.51.6.283
Data publikacji: 2018-02-27 16:38:14
Data złożenia artykułu: 2017-05-19 18:35:19


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