US criminal authorities are gathering information on contacts among dozens of short selling hedge funds and research outfits as they investigate possible trading abuses by hedge funds.  This comes after complaints from GameStop and AMC Shareholders.The Department of Justice has sent subpoenas asking for information about a list of more than two dozen firms to a smaller group of market participants. Among other things, they are asking for calendar information and communications.Patrick's Books:Statistics For The Trading Floor:  https://amzn.to/3eerLA0Derivatives For The Trading Floor:  https://amzn.to/3cjsyPFCorporate Finance:  https://amzn.to/3fn3rvC Patreon Page: https://www.patreon.com/PatrickBoyleOnFinanceVisit our website: www.onfinance.orgFollow Patrick on Twitter Here: https://twitter.com/PatrickEBoylePatrick Boyle on YouTube Support the show