I'll choose this one. Btw thanks for the links I didnt get on those approvals !?????
3. Sec
Before extending the literature on indirect empirical evidence by analyzing information-based
market manipulation on Twitter, we construct an updated database of SEC civil enforcement ac-
tions. Our work is closely related to Aggarwal and Wu (2006) who collect all SEC litigation releases
containing keywords related to market manipulation published between 1990 and 20013 and then
manually classify all cases by the type of stocks targeted (listed on NYSE, AMEX, NASDAQ, OTC
Markets...) and the type of people involved (insiders, brokers, shareholders...). We complement
their findings by (1) extending the sample period, (2) using the new SEC classification, and (3)
examining specifically pump-and-dump schemes to identify those involved in frauds (insiders, pro-
moters, traders...) and the tools used to send false or misleading information in the marketplace
(press releases, spam e-mails, websites, message boards, social media...).