 Atrion NASDAQ:ATRI was downgraded by research analysts at BidaskClub from a hold rating to a sell rating in a report released on Friday, BidAskClub reports. NASDAQ:ATRI opened at 643.04 on Friday. The company has a market capitalization of 1.20 billion, a PE ratio of 33.06 and a beta of 0.16. Atrion has a 52-week low ... 