Kaiser Aluminum is trading 7.03% down at $108.10 in after-hours on October 30, amid broad market weakness; no clear company-specific catalyst was found. - The stock fell 2.96% in the regular session; its latest reported earnings were released October 21. - The S&P 500 dropped 1.73% and the Nasdaq Composite 3.78% alongside reported hawkish Federal Reserve remarks, pointing to broader market sentiment rather than a confirmed Kaiser-specific catalyst.