Biotech stocks are high-risk, high-return opportunities that are under the mercy of several make-or-break catalysts, most of which are binary events. It pays to remain cognizant of the timing of these catalysts and which way they will likely pan out. Benzinga brings to investors a weekly feature focusing on five key catalysts that could impact the stock prices of the respective companies in an appreciable manner. 1. Arrowhead Pharmaceuticals, Inc. (NASDAQ:ARWR) Date: Tuesday, June 25Catalyst: Discussion of Phase 3 PALISADE study of investigational plozasiran in patients with genetically confir…