Silica Holdings (SLCA) Moves 9.4% Higher: Will This Strength Last? Posted byZacks Equity Research September 14, 2021 Leave a comment on Silica Holdings (SLCA) Moves 9.4% Higher: Will This Strength Last? Silica Holdings (SLCA) saw its shares surge in the last session with trading volume being higher than average. The latest trend in earnings estimate r…