Pharmaceutical giant Bayer faced yet another legal setback, after a San Francisco jury concluded that the company's popular weedkiller, Roundup, triggered a man's Hodgkin's lymphoma. News of the court loss caused shares to plunge on Wednesday, and investors - many of whom were wary of Bayer's initial acquisition of agricultural giant, Monsanto - are more concerned than ever before. Yahoo Finance's Sibile Marcellus has the latest.