UP AFTER EARNINGS: Extraction Oil & Gas (XOG) up 18.9%... DMC Global (BOOM) up 11.5%... Trade Desk (TTD) up 11.3%... Cardronics (CATM) up 8.7%... Zillow (Z) up 8.0%... Universal Display (OLED) up 6.4%... Boyd Gaming (BYD) up 4.5%... Comfort Systems (FIX) up 4.0%... Cytokinetics (CYTK) up 3.9%... Roku (ROKU) up 3.8%... TherapeuticsMD (TXMD) up 3.7%... Baidu (BIDU) up 3.0%... Casella Waste (CWST) up 3.0%... Keysight Technologies (KEYS) up 2.8%... Data I/O (DAIO) up 2.4%... HP enterprise (HPE) up 2.3%. DOWN AFTER EARNINGS: Stamps.com (STMP) down 48.4%... Kraft Heinz (KHC) down 19.7%... Aspen Aerogels (ASPN) down 15.3%... Dropbox (DBX) down 12.0%... Allscripts (MDRX) down 11.4%... Applied Optoelectronics (AAOI) down 9.2%... Casa Systems (CASA) down 8.0%... Ultra Clean Holdings (UCTT) down 8.0%... BJ Restaurants (BJRI) down 7.4%... Biomarin (BMRN) down 6.5%... Textainer Group (TGH) down 6.1%... Appian Corp (APPN) down 5.8%... Infinera (INFN) down 5.2%... Nevro Corp (NVRO) down 5.0%... First Solar (FSLR) down 4.9%... Century Aluminum (CENX) down 4.7%... Universal Electronics (UEIC) down 3.8%... Re/max (RMAX) down 3.4%... Staar Surgical (STAA) down 2.6%... Solar Capital (SLRC) down 2.2%... iQIYI (IQ) down 2.2%... eHealth (EHTH) down 2.1%... Parsley Energy (PE) down 1.6%... Exact Sciences (EXAS) down 1.4%. Movers as of 18:30ET.