NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Social Transmission Bias and Investor Behavior

Bing Han, David Hirshleifer, Johan Walden

NBER Working Paper No. 24281
Issued in February 2018
NBER Program(s):Asset Pricing

We offer a new social approach to investment decision-making and asset prices. In our model, senders' propensity to discuss their strategies' returns, and receivers' propensity to be converted, are increasing in sender return. A distinctive implication is that the rate of conversion of investors to active investing is convex in sender return. Unconditionally, active strategies (high variance, skewness, and personal involvement) dominate the population unless the return penalty to active investing is too large. Thus, the model can explain overvaluation of `active' asset characteristics even when investors have no inherent preference over them. It also has strong predictions for how adoption of active strategies depends on features of the investor social network. In contrast with nonsocial approaches, sociability and other features of the sending and receiving processes are determinants of the popularity of active investing and the pricing of active strategies.

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Document Object Identifier (DOI): 10.3386/w24281

 
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