Biogen’s stock gets a big boost from 2 upgrades a week before earnings By: MarketWatch October 17, 2017 at 15:19 PM EDT Biogen’s stock rallies to 2-year high after two analysts raise their ratings to buy and their price targets to at least $400. Read More >> Related Stocks: Biogen Idec Nasdaq Biotechnology Ishares ETF Standard & Poors 500