Copper Mining Stocks Surge 11%, Market Cap Increases by 570 Billion Won in One Day

Ero Copper Corp (NYSE: ERO) closed at $32.20 on May 12—a gain of 11.15% from the previous session—on the New York Stock Exchange. At that level, each share is worth roughly KRW 43,000. Trading volume jumped to 1,291,775 shares, well above its average, and market capitalization rose by about $420 million to approximately $3.36 billion (KRW 4.5 trillion).

In its Q1 2026 operating and financial results, announced in early May, the company reported copper production of 17,287 tonnes, net income of $108.8 million and revenue of $263.2 million. It maintained its full-year copper production guidance of 67,500–77,500 tonnes and left its investment plans unchanged.

Ero Copper also reaffirmed its commitment to reducing leverage while growing its Tucumã and Furnas projects in Brazil, having lowered net debt to about $490.7 million through continued cash generation.

Headquartered in Vancouver, Canada, Ero Copper is a Brazil-focused copper and gold mining company that produces copper concentrate and gold at its Caraíba operation in Bahia, Tucumã in Pará and Xavantina in Mato Grosso. Since its founding in 2016, it has grown into a mid-tier producer on the back of Brazilian copper assets, with the development of the Furnas copper-gold project cited as a medium- to long-term growth driver.