UP AFTER EARNINGS: GenMark Diagnostics (GNMK) up 22.5%… Omeros (OMER) up 17.0%… Boingo Wireless (WIFI) up 13.6%… Air Transport (ATSG) up 11.1%… Intrepid Potash (IPI) up 9.3%… Conformis (CFMS) up 6.5%… Livongo (LVGO) up 4.9%… Ameresco (AMRC) up 2.7%… Northwest Pipe Company (NWPX) up 2.4%. DOWN AFTER EARNINGS: TransMedics (TMDX) down 13.1%… Tilray (TLRY) down 10.9%… Ferro Corp (FOE) down 8.5%… Ferroglobe (GSM) down 5.9%… Zogenix (ZGNX) down 5.0%… PTC Therapeutics (PTCT) down 4.8%… Maxar Technologies (MAXR) down 4.1%… eHealth (EHTH) down 3.2%… GreenSky (GSKY) down 2.2%. ALSO LOWER: Visa (V) down 1.5% after cutting Q2 guidance… Hyatt (H) down 1.5% after withdrawing guidance. Movers as of 18:45ET.