Predicting abnormal trading behavior from internet rumor propagation: a machine learning approach

Li-Chen Cheng (), Wei-Ting Lu () and Benjamin Yeo ()
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Li-Chen Cheng: National Taipei University of Technology
Wei-Ting Lu: National Taipei University of Technology
Benjamin Yeo: Seattle University

Financial Innovation, 2023, vol. 9, issue 1, 1-23

Abstract: Abstract In 2021, the abnormal short-term price fluctuations of GameStop, which were triggered by internet stock discussions, drew the attention of academics, financial analysts, and stock trading commissions alike, prompting calls to address such events and maintain market stability. However, the impact of stock discussions on volatile trading behavior has received comparatively less attention than traditional fundamentals. Furthermore, data mining methods are less often used to predict stock trading despite their higher accuracy. This study adopts an innovative approach using social media data to obtain stock rumors, and then trains three decision trees to demonstrate the impact of rumor propagation on stock trading behavior. Our findings show that rumor propagation outperforms traditional fundamentals in predicting abnormal trading behavior. The study serves as an impetus for further research using data mining as a method of inquiry.

Keywords: Fake news; Rumors; Data mining; Social media; Classification; Machine learning; GameStop; Reddit (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (4)

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DOI: 10.1186/s40854-022-00423-9

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