A behavioral analysis of investor diversification

Ana-Maria Fuertes, Yaz Muradoglu and Ayse Ozturkkal ()

The European Journal of Finance, 2014, vol. 20, issue 6, 499-523

Abstract: This paper studies the link between individual investors' portfolio diversification levels and various personal traits that proxy informational advantages and overconfidence. The analysis is based on objective data from the largest Turkish brokerage house tracking 59,951 individual investors' accounts with a total of 3,248,654 million transactions over the period 2008-2010. Wealthier, highly educated, older investors working in the finance sector and those trading relatively often show higher diversification levels possibly because they are better equipped to obtain and process information. Finance professionals, married investors, and those placing high-volume orders through investment centers show poorer diversification possibly as a reflection of overconfidence. Our analysis reveals important nonlinear effects, implying that the marginal impact of overconfidence on diversification is not uniform across investors but varies according to the investor's information gathering and processing abilities.

Date: 2014
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DOI: 10.1080/1351847X.2012.719829

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