Giving Content to Investor Sentiment: The Role of Media in the Stock Market

51 Pages Posted: 21 Mar 2005  

Paul C. Tetlock

Columbia Business School - Finance and Economics

Abstract

I quantitatively measure the nature of the media's interactions with the stock market using daily content from a popular Wall Street Journal column. I find that high media pessimism predicts downward pressure on market prices followed by a reversion to fundamentals, and unusually high or low pessimism predicts high market trading volume. These results and others are consistent with theoretical models of noise and liquidity traders. However, the evidence is inconsistent with theories of media content as a proxy for new information about fundamental asset values, as a proxy for market volatility, or as a sideshow with no relationship to asset markets.

Keywords: Investor sentiment, financial news media, content analysis, efficient markets

JEL Classification: G12, G14

Suggested Citation

Tetlock, Paul C., Giving Content to Investor Sentiment: The Role of Media in the Stock Market. Journal of Finance, Forthcoming. Available at SSRN: https://ssrn.com/abstract=685145 or http://dx.doi.org/10.2139/ssrn.685145

Paul C. Tetlock (Contact Author)

Columbia Business School - Finance and Economics ( email )

3022 Broadway
New York, NY 10027
United States
212-854-9895 (Fax)

HOME PAGE: http://www0.gsb.columbia.edu/faculty/ptetlock/

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