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Social Transmission Bias and Investor Behavior

Published online by Cambridge University Press:  28 January 2021

Bing Han*
Affiliation:
University of Toronto Rotman School of Management
David Hirshleifer
Affiliation:
University of California at Irvine Merage School of Business david.h@uci.edu
Johan Walden
Affiliation:
University of California at Berkeley, University of Lausanne, and Swiss Finance Institute walden@haas.berkeley.edu
*
bing.han@Rotman.utoronto.ca (corresponding author)
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Abstract

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We offer a new social approach to investment decision making and asset prices. Investors discuss their strategies and convert others to their strategies with a probability that increases in investment returns. The conversion rate is shown to be convex in realized returns. Unconditionally, active strategies (e.g., high variance and skewness) dominate, although investors have no inherent preference for these characteristics. The model has strong predictions for how the adoption of active strategies depends on investors’ social networks. In contrast with nonsocial approaches, sociability, self-enhancing transmission, and other features of the communication process determine the popularity and pricing of active investment strategies.

Information

Type
Research Article
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of the Michael G. Foster School of Business, University of Washington
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