US Silica Holdings Stock Getting Very Oversold By: Energy Stock Channel May 20, 2015 at 11:26 AM EDT In trading on Wednesday, shares of US Silica Holdings, Inc. (SLCA) entered into oversold territory, changing hands as low as $31.02 per share.. Read More >> Related Stocks: S&P Oil & Gas Eqpt & Services SPDR U.S. Silica Holdings Inc