St. Jude sues short-seller over heart device allegations

St. Jude Medical Inc on Wednesday filed a lawsuit against short-selling firm Muddy Waters and cyber security company MedSec Holdings Ltd, saying they intentionally disseminated false information about its heart devices to manipulate its stock. St. Jude's shares fell sharply on Aug. 25 after Muddy Waters, run by Carson Block, said it had taken a short position in company's stock after uncovering security flaws in its devices. Block said last week his firm's position was motivated by research from