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Mirror or Molder? A Study of Media Coverage, Stock Prices, and Trading Volumes in Germany

Authors


Bertram Scheufele; e-mail: bertram.scheufele@uni-hohenheim.de

Abstract

This article investigates the short-term relationship between media coverage, stock prices, and trading volumes of eight listed German companies. A content analysis of news reports about the selected companies and a secondary analysis of the daily changes in closing prices and the trading volumes of these companies were combined in a time-series design. After ARIMA-modeling each of them, the results suggest that media coverage rather reflects than shapes the development at stock exchanges from a short-term perspective (2 months). There were almost no hints for a widespread media effect, that is, an impact on so many investors that it will result in a measurable change in stock prices or trading volumes. Finally, theoretical and methodological consequences for exploring widespread media effects are discussed.

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