Chemours shares fell 4.4% to $17.57 after the New York Attorney General filed a lawsuit against the company, alongside 3M and DuPont, for contributing to decades of toxic PFAS pollution. The lawsuit alleges that Chemours manufactured, marketed, and sold PFAS knowing their toxicity, deceiving consumers and failing to warn the public about environmental contamination and health risks. This legal action provides a significant company-specific catalyst for today's stock decline, diverging from broader market indices that are trading modestly higher.