[Citadel Securities Drops U.S. Lawsuit, Turns to U.K. for Arbitration Compensation] According to CoinDesk, Citadel Securities has dropped its U.S. trade secrets lawsuit against Portofino Technologies and is instead pursuing £6 million in arbitration compensation through U.K. bankruptcy proceedings. Citadel Securities and Portofino Technologies jointly filed to dismiss the New York case, with Citadel Securities stating that continuing the U.S. lawsuit lacks economic viability and that the London arbitration ruling is difficult to enforce.