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Cyber criminals have infected hundreds of thousands of computers with a virus called 'Pony' to steal bitcoins and other digital currencies.
CNBC's Courtney Reagan looks at today's leading and lagging stocks.
Andrew Left, Citron Research founder and editor, thinks Plug Power is worth 50 cents, and questions the company's management.
Plug Power's stock hit $12 today, but Andrew Left, Citron Research founder and editor, thinks the stock is worth $0.50.