Sigma Lithium Corporation (SGML) shares, a key vehicle for US investors looking to invest in Brazil’s mining sector without needing a local B3 listing or an American Depositary Receipt (ADR), surged 5.98% on Tuesday to close at $10.46. The Brazilian lithium miner's stock drew momentum from its recent announcement of beating second-quarter production guidance alongside progress in resolving a long-standing environmental dispute with the Minas Gerais state government, easing a significant regulatory risk overhang.