 GenMark Diagnostics NASDAQ:GNMK was downgraded by analysts at BidaskClub from a hold rating to a sell rating in a research report issued on Wednesday, BidAskClub reports. A number of other analysts have also commented on GNMK. Cowen boosted their price objective on shares of GenMark Diagnostics from 10.00 to 15.00 and gave the stock an ... 