Sigma Lithium Corporation (SGML), the Brazilian-based producer of lithium concentrate, saw its stock surge 5.98% today to close at $10.46, marking a sharp technical reversal from its recent lows. The move highlights the volatility and investor interest in one of the few Brazilian companies that lists its ordinary shares directly on a major US exchange (NASDAQ), rather than through an American Depositary Receipt (ADR), granting retail US investors direct access to the stock.