Baystreet Staff - Thursday, August 4, 2016 Sangamo Biosciences (SGMO) Plummets on Q2 Loss Sangamo Biosciences, Inc. (NASDAQ: SGMO) shares thundered lower by 27.7% to $4.95, after the company posted a wider-than-expected Q2 loss. Share volume was 2.9 million, compared to an all-day average of 802,000