Investor Sentiment in the Stock Market
Malcolm P. Baker
Harvard Business School; National Bureau of Economic Research (NBER)
NYU Stern School of Business; National Bureau of Economic Research (NBER)
February 12, 2007
Real investors and markets are too complicated to be neatly summarized by a few selected biases and trading frictions. The "top down" approach to behavioral finance focuses on the measurement of reduced form, aggregate sentiment and traces its effects to stock returns. It builds on the two broader and more irrefutable assumptions of behavioral finance - sentiment and the limits to arbitrage - to explain which stocks are likely to be most affected by sentiment. In particular, stocks of low capitalization, younger, unprofitable, high volatility, non-dividend paying, growth companies, or stocks of firms in financial distress, are likely to be disproportionately sensitive to broad waves of investor sentiment. We review the theoretical and empirical evidence for these predictions.
Number of Pages in PDF File: 37
Keywords: stock market, sentiment, asset pricing, behavioral finance, behavioral economics
JEL Classification: E44, G12, G14working papers series
Date posted: February 14, 2007 ; Last revised: January 12, 2009
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