🔴 Rio Tinto is trading 6.4% down in after-hours trading on October 5, 2026, — catalyst unconfirmed

Rio Tinto is trading at $89.51, down 6.41% after its October 5 regular-session close at $95.64; no reliable report links the after-hours drop to a specific announcement. - GIC is reportedly preparing a potential $7 billion bid for Rio Tinto’s infrastructure assets; reports do not explain the drop. - Separate coverage describes a Madagascar contamination claim involving more than 6,500 people but does not establish it as the cause. Market context was positive, so broad-market weakness does not explain the drop.