Investor Pessimism and the German Stock Market: Exploring Google Search Queries

Thomas Dimpfl and Vladislav Kleiman

German Economic Review, 2019, vol. 20, issue 1, 1-28

Abstract: We analyze the relationship of retail investor sentiment and the German stock market by introducing four distinct investor pessimism indices (IPIs) based on selected aggregate Google search queries. We assess the predictive power of weekly changes in sentiment captured by the IPIs for contemporaneous and future DAX returns, volatility and trading volume. The indices are found to have individually varying, but overall remarkably high explanatory power. An increase in retail investor pessimism is accompanied by decreasing contemporaneous market returns and an increase in volatility and trading volume. Future returns tend to increase while future volatility and trading volume decrease. The outcome is in line with the conjecture of correction effects. Overall, the results are well in line with modern investor sentiment theory.

Date: 2019
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https://doi.org/10.1111/geer.12137

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