Ero Copper Corp. (ERO) shares soared 7.9% in the last trading session to close at $18.72. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 19% gain over the past four weeks.Ero Copper’s shares have gained since it reported the final assay results from its 28,000-meter Phase 1 drill program at the Furnas Copper-Gold Project, located in the Carajás Mineral Province in Pará State, Brazil. Results confirm high-grade continuity through ...