# The S&P 500 and Nasdaq Post Biggest Gains in Six Weeks

> **Open Intelligence Dossier** · First detected: 2026-09-18 14:20 UTC · Category: Business

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*Canonical Source: https://pulse.byoviral.com/trend/2026-09-18/the-s-p-500-and-nasdaq-post-biggest-gains-in-six-weeks*