{"title":"证券集体诉讼前后的异常股票回报和做空：申请前新闻发布的作用","authors":"Chris Stivers , Licheng Sun , Sounak Saha","doi":"10.1016/j.finmar.2023.100868","DOIUrl":null,"url":null,"abstract":"<div><p>Studying 1,473 U.S. securities class action (SCA) lawsuits over 2009–2019, we find that the pre-filing abnormal negative returns and shorting are largely linked to public investigation news that precedes the SCA lawsuit filing. Across all the lawsuits, 73% of the total abnormal negative returns over the ten-day pre-filing period are attributed to the 31.6% of the cases that had investigation news over that pre-filing period. Our findings indicate that investors’ ability to anticipate SCA lawsuits is not as economically significant as previous studies suggest, and that SCA shorting profitability is substantially linked to analysis of public information.</p></div>","PeriodicalId":47899,"journal":{"name":"Journal of Financial Markets","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Abnormal stock returns and shorting around securities class action lawsuits: The role of pre-filing news releases\",\"authors\":\"Chris Stivers , Licheng Sun , Sounak Saha\",\"doi\":\"10.1016/j.finmar.2023.100868\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Studying 1,473 U.S. securities class action (SCA) lawsuits over 2009–2019, we find that the pre-filing abnormal negative returns and shorting are largely linked to public investigation news that precedes the SCA lawsuit filing. Across all the lawsuits, 73% of the total abnormal negative returns over the ten-day pre-filing period are attributed to the 31.6% of the cases that had investigation news over that pre-filing period. Our findings indicate that investors’ ability to anticipate SCA lawsuits is not as economically significant as previous studies suggest, and that SCA shorting profitability is substantially linked to analysis of public information.</p></div>\",\"PeriodicalId\":47899,\"journal\":{\"name\":\"Journal of Financial Markets\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Financial Markets\",\"FirstCategoryId\":\"96\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1386418123000666\",\"RegionNum\":2,\"RegionCategory\":\"经济学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"BUSINESS, FINANCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Financial Markets","FirstCategoryId":"96","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1386418123000666","RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BUSINESS, FINANCE","Score":null,"Total":0}
Abnormal stock returns and shorting around securities class action lawsuits: The role of pre-filing news releases
Studying 1,473 U.S. securities class action (SCA) lawsuits over 2009–2019, we find that the pre-filing abnormal negative returns and shorting are largely linked to public investigation news that precedes the SCA lawsuit filing. Across all the lawsuits, 73% of the total abnormal negative returns over the ten-day pre-filing period are attributed to the 31.6% of the cases that had investigation news over that pre-filing period. Our findings indicate that investors’ ability to anticipate SCA lawsuits is not as economically significant as previous studies suggest, and that SCA shorting profitability is substantially linked to analysis of public information.
期刊介绍：
The Journal of Financial Markets publishes high quality original research on applied and theoretical issues related to securities trading and pricing. Area of coverage includes the analysis and design of trading mechanisms, optimal order placement strategies, the role of information in securities markets, financial intermediation as it relates to securities investments - for example, the structure of brokerage and mutual fund industries, and analyses of short and long run horizon price behaviour. The journal strives to maintain a balance between theoretical and empirical work, and aims to provide prompt and constructive reviews to paper submitters.
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