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

Paul C. Tetlock

Journal of Finance, 2007, vol. 62, issue 3, 1139-1168

Abstract: I quantitatively measure the interactions between the media and 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 and similar results are consistent with theoretical models of noise and liquidity traders, and are 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. Copyright 2007 by The American Finance Association.

Date: 2007
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