Former Merck ($MRK) analyst Zachary Zwerko pleaded guilty to federal insider-trading charges on Thursday for passing merger tips to a business school chum. The tips allowed the New York Mellon trader to make $700,000 in profits, Bloomberg reports. Zwerko got $57,000 for the tips and now a shot at jail. His former Rutgers Business School classmate, David Post, pleaded guilty in October. More from FierceBiotech