HIGHER: Proteostasis Therapeutics (PTI), up 13.5% after reporting the FDA has granted Fast Track Designation for the company’s triple combination program for the treatment of cystic fibrosis… Destination XL (DXLG), up 9% after Carlo Cannell’s Cannell Capital disclosed a 7.47% stake and said they may seek talks. LOWER: Boeing (BA), Ford (F), General Motors (GM), Deere (DE) and Caterpillar (CAT) are among the many stocks sliding in apparent reaction to news that China plans for 25% tariffs on American products, including airplanes, automobiles and soybeans, in retaliation against President Donald Trump’s proposed penalties on Chinese goods… DexCom (DXCM), down 4% after Goldman Sachs analyst Issac Ro started the stock with a Sell rating and $57 price target. DOWN AFTER EARNINGS: Cloudera (CLDR), down 34%… Dave & Buster’s (PLAY), down 9%… CarMax (KMX), down 7%.