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Social Media and Financial News Manipulation

Author

Listed:
  • Shimon Kogan
  • Tobias J Moskowitz
  • Marina Niessner

Abstract

We examine an undercover Securities and Exchange Commission (SEC) investigation into the manipulation of financial news on social media. While fraudulent news had a direct positive impact on retail trading and prices, revelation of the fraud by the SEC announcement resulted in significantly lower retail trading volume on all news, including legitimate news, on these platforms. For small firms, volume declined by 23.5% and price volatility dropped by 1.3%. We find evidence consistent with concerns of fraud causing the decline in trading activity and price volatility, which we interpret through the lens of social capital, and attempt to rule out alternative explanations. The results highlight the indirect consequences of fraud and its spillover effects that reduce the social network’s impact on information dissemination, especially for small, opaque firms.

Suggested Citation

  • Shimon Kogan & Tobias J Moskowitz & Marina Niessner, 2023. "Social Media and Financial News Manipulation," Review of Finance, European Finance Association, vol. 27(4), pages 1229-1268.
    • Handle: RePEc:oup:revfin:v:27:y:2023:i:4:p:1229-1268.
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    File URL: http://hdl.handle.net/10.1093/rof/rfac058
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    1. Stephen Knack & Philip Keefer, 1997. "Does Social Capital Have an Economic Payoff? A Cross-Country Investigation," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 112(4), pages 1251-1288.
    2. Hunt Allcott & Matthew Gentzkow, 2017. "Social Media and Fake News in the 2016 Election," NBER Working Papers 23089, National Bureau of Economic Research, Inc.
    3. Milgrom, Paul & Stokey, Nancy, 1982. "Information, trade and common knowledge," Journal of Economic Theory, Elsevier, vol. 26(1), pages 17-27, February.
    4. Matthew Gentzkow & Jesse M. Shapiro, 2006. "Media Bias and Reputation," Journal of Political Economy, University of Chicago Press, vol. 114(2), pages 280-316, April.
    5. Luigi Guiso & Paola Sapienza & Luigi Zingales, 2004. "The Role of Social Capital in Financial Development," American Economic Review, American Economic Association, vol. 94(3), pages 526-556, June.
    6. Christoph Aymanns & Jakob Foerster & Co-Pierre Georg, 2017. "Fake News in Social Networks," Papers 1708.06233, arXiv.org.
    7. Fama, Eugene F, 1970. "Efficient Capital Markets: A Review of Theory and Empirical Work," Journal of Finance, American Finance Association, vol. 25(2), pages 383-417, May.
    8. Luigi Guiso & Paola Sapienza & Luigi Zingales, 2008. "Trusting the Stock Market," Journal of Finance, American Finance Association, vol. 63(6), pages 2557-2600, December.
    9. Bushee, Brian & Cedergren, Matthew & Michels, Jeremy, 2020. "Does the media help or hurt retail investors during the IPO quiet period?," Journal of Accounting and Economics, Elsevier, vol. 69(1).
    10. Karen K. Nelson & Richard A. Price & Brian R. Rountree, 2013. "Are Individual Investors Influenced by the Optimism and Credibility of Stock Spam Recommendations?," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 40(9-10), pages 1155-1183, November.
    11. Hanke, Michael & Hauser, Florian, 2008. "On the effects of stock spam e-mails," Journal of Financial Markets, Elsevier, vol. 11(1), pages 57-83, February.
    12. Luigi Guiso & Paola Sapienza & Luigi Zingales, 2010. "Civic Capital as the Missing Link," NBER Working Papers 15845, National Bureau of Economic Research, Inc.
    13. Tim Loughran & Bill Mcdonald, 2016. "Textual Analysis in Accounting and Finance: A Survey," Journal of Accounting Research, Wiley Blackwell, vol. 54(4), pages 1187-1230, September.
    14. Christoph Aymanns & Jakob Foerster & Co-Pierre Georg, 2017. "Fake News in Social Networks," Working Papers on Finance 1804, University of St. Gallen, School of Finance.
    15. Sanjiv Sabherwal & Salil K. Sarkar & Ying Zhang, 2011. "Do Internet Stock Message Boards Influence Trading? Evidence from Heavily Discussed Stocks with No Fundamental News," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 38(9-10), pages 1209-1237, November.
    16. repec:bla:jfinan:v:59:y:2004:i:3:p:1259-1294 is not listed on IDEAS
    17. Hunt Allcott & Matthew Gentzkow, 2017. "Social Media and Fake News in the 2016 Election," Journal of Economic Perspectives, American Economic Association, vol. 31(2), pages 211-236, Spring.
    18. J. Anthony Cookson & Marina Niessner, 2020. "Why Don't We Agree? Evidence from a Social Network of Investors," Journal of Finance, American Finance Association, vol. 75(1), pages 173-228, February.
    19. Saif Ullah & Nadia Massoud & Barry Scholnick, 2014. "The Impact of Fraudulent False Information on Equity Values," Journal of Business Ethics, Springer, vol. 120(2), pages 219-235, March.
    20. Ronald A. Dye & Sri S. Sridhar, 2004. "Reliability‐Relevance Trade‐Offs and the Efficiency of Aggregation," Journal of Accounting Research, Wiley Blackwell, vol. 42(1), pages 51-88, March.
    21. Rajesh K. Aggarwal & Guojun Wu, 2006. "Stock Market Manipulations," The Journal of Business, University of Chicago Press, vol. 79(4), pages 1915-1954, July.
    22. Hailiang Chen & Prabuddha De & Yu (Jeffrey) Hu & Byoung-Hyoun Hwang, 2014. "Wisdom of Crowds: The Value of Stock Opinions Transmitted Through Social Media," The Review of Financial Studies, Society for Financial Studies, vol. 27(5), pages 1367-1403.
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    Cited by:

    1. Mignot, Sarah & Pellizzari, Paolo & Westerhoff, Frank H., 2024. "Fake news and asset price dynamics," BERG Working Paper Series 192, Bamberg University, Bamberg Economic Research Group.
    2. Hong, Ziyang & Liu, Qingfu & Tse, Yiuman & Wang, Zilu, 2023. "Black mouth, investor attention, and stock return," International Review of Financial Analysis, Elsevier, vol. 90(C).
    3. Cookson, J. Anthony & Lu, Runjing & Mullins, William & Niessner, Marina, 2024. "The social signal," Journal of Financial Economics, Elsevier, vol. 158(C).
    4. Zhong, Zhiyuan & Wu, Qiang & Wang, Manling, 2024. "Does the U.S.-China trade war stop? A novel event study on fake news and stock price in China," Finance Research Letters, Elsevier, vol. 66(C).

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    More about this item

    Keywords

    Social media; FinTech; Stock market manipulation; Seeking Alpha; Trust;
    All these keywords.

    JEL classification:

    • G41 - Financial Economics - - Behavioral Finance - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making in Financial Markets
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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