Sigma Lithium(US:SGML) Globenewswire·2026-01-27 22:21Core Viewpoint - Sigma Lithium Corporation is under investigation for potential securities fraud and unlawful business practices, following a series of operational and liquidity issues that have negatively impacted its stock performance [1][3]. Group 1: Company Performance and Stock Impact - On January 8, 2026, Bank of America downgraded Sigma Lithium from Neutral to Underperform due to unresolved operational and liquidity issues, leading to a stock price decline of $2.36 per share, or 15.07%, closing at $13.30 per share [3]. - Following a report on January 15, 2026, regarding the shutdown of three waste piles at Sigma Lithium's mine by Brazil's Labor Ministry due to safety concerns, the stock price fell by $4.32 per share, or 26.04%, closing at $12.27 per share on January 16, 2026 [4]. Group 2: Legal Investigation - Pomerantz LLP is investigating claims on behalf of Sigma Lithium investors regarding potential securities fraud or other unlawful business practices by the company and its officers or directors [1].