Wells Fargo Downgrades U.S. Silica To Market Perform

Analysts at Wells Fargo downgraded U.S. Silica Holdings

from Outperform to Market Perform. U.S. Silica shares have surged 27.55% over the past 52 weeks, while the S&P 500 index has gained 14.38% in the same period. U.S. Silica's shares fell 0.73% to $43.38 in pre-market trading.