U.S. Silica Downgrade: 'It's Hard To Think Of A Better Short' By: Benzinga via Benzinga December 12, 2016 at 08:59 AM EST Shares of U.S. Silica Holdings Inc (NYSE: SLCA) have surged nearly 200 percent year-to-date and are trading at a substantial premium to ... Read More >> Related Stocks: U.S. Silica Holdings Inc