Twitter CEO Jack Dorsey testifies during a remote video hearing held by subcommittees of the U.S. House of Representatives Energy and Commerce Committee on "Social Media's Role in Promoting Extremism and Misinformation" in Washington, U.S., March 25, 2021.Block jumped more than 5% on Monday, leading a rally in shares of fintech companies as analysts downplayed the threat of JPMorgan Chase's reported plan to charge data aggregators for access to customer financial information.The recovery followed steep decl ...