Gainers

• Warrior Met Coal, Inc. HCC stock rose 1.9% to $19.95 during Tuesday's after-market session.
• Coeur Mining, Inc. CDE stock surged 1.2% to $5.65. The most recent rating by RBC Capital, on January 21, is at Sector Perform, with a price target of $6.00.
• Hecla Mining, Inc. HL stock moved upwards by 1.2% to $2.91. The most recent rating by B. Riley, on November 25, is at Neutral, with a price target of $2.75.

Losers

• Hudson Technologies, Inc. HDSN shares fell 1.8% to $0.85 during Tuesday's after-market session.