{"title":"Social Media and Financial News Manipulation","authors":"Shimon Kogan, Tobias J Moskowitz, Marina Niessner","doi":"10.1093/rof/rfac058","DOIUrl":null,"url":null,"abstract":"We examine an undercover 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.","PeriodicalId":48036,"journal":{"name":"Review of Finance","volume":null,"pages":null},"PeriodicalIF":5.6000,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Review of Finance","FirstCategoryId":"96","ListUrlMain":"https://doi.org/10.1093/rof/rfac058","RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BUSINESS, FINANCE","Score":null,"Total":0}
引用次数: 0
Abstract
We examine an undercover 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.
期刊介绍：
The Review of Finance, the official journal of the European Finance Association, aims at a wide circulation and visibility in the finance profession. The journal publishes high-quality papers in all areas of financial economics, both established and newly developing fields: • •Asset pricing •Corporate finance •Banking and market microstructure •Law and finance •Behavioral finance •Experimental finance Review of Finance occasionally publishes special issues on timely topics, including selected papers presented at the meetings of the European Finance Association or at other selected conferences in the field.
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