UPDATE 4-Roche, AC Immune drop Alzheimer drug trials after setback By: Reuters: Company News January 30, 2019 at 10:04 AM EST * AC Immune shares plunge 65 percent (Adds AC Immune CEO commment, shares) Read More >> Related Stocks: AC Immune S.A. Astrazeneca Plc ADR Biogen Idec Eli Lilly Johnson & Johnson Merck & Co Rogers Corp