UPDATE 3-Roche, AC Immune drop Alzheimer drug trials after setback By: Reuters: Company News January 30, 2019 at 08:09 AM EST * AC Immune shares plunge 37 percent before the bell (Adds AC Immune share movement, analyst comments) Read More >> Related Stocks: AC Immune S.A. Astrazeneca Plc ADR Biogen Idec Eli Lilly Johnson & Johnson Rogers Corp