UPDATE 2-Biogen scraps Alzheimer drug trials, shares slump by a quarter By: Reuters: Company News March 21, 2019 at 09:10 AM EDT * Failure comes after Eisai CEO expressed confidence (Adds background, analyst comment; updates share price) Read More >> Related Stocks: Astrazeneca Plc ADR Biogen Idec Eli Lilly Johnson & Johnson Merck & Co Pfizer Rogers Corp