Quanex Building Products is exploding higher following the company's third-quarter fiscal 2026 earnings report released after the market closed on September 3. The stock is reacting to a strong performance where the company beat consensus estimates with earnings of $0.79 per share against an expected $0.68, alongside revenue of $501.85 million that also exceeded expectations. While peers in the construction materials sector are seeing modest gains between 1.6% and 5.4%, the outsized move in Quanex is driven by this earnings surprise and the company's progress in margin expansion and debt repayment.