· Vertex Pharmaceuticals Incorporated’s VRTX shares surged 20.9% after the drug maker declared positive results from clinical studies of its cystic fibrosis treatments· Shares of Discovery Communications Inc. DISCA gained 4.3% after the company is in talks to merge with Scripps Networks Interactive Inc (SNI)· Shares of United Continental Holdings Inc UAL declined 5.9% after its total operating expenses, excluding special items, grew 8.3% year over year to $8.6 billion· Shares of Crown Castle International Corp. CCI increased 2.1% after the company is acquiring Lightower Fiber Networks for about $7.1 billion in cashWant the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report United Continental Holdings, Inc. (UAL): Free Stock Analysis Report Crown Castle International Corporation (CCI): Free Stock Analysis Report Vertex Pharmaceuticals Incorporated (VRTX): Free Stock Analysis Report Discovery Communications, Inc. (DISCA): Free Stock Analysis Report To read this article on Zacks.com click here.