"Rotten To The Core" OSI Shares Plunge 15% After Muddy Waters Unveils Short Position

Muddy Waters' founder Carson Block unveiled his latest short play Wednesday morning. And instead of being another obviously fraudulent Chinese company, Block's target is OSI Systems, an American firm that manufactures security equipment x-ray machines and metal detectors. The company is best known as the owner of Rapiscan Systems - a division that manufacturers scanning machines used at airports.