Astera Labs is trading 8.66% lower at $7.91, as semiconductor stocks face pressure from renewed concerns about AI-chip and data-center demand. - OpenAI paused training on some advanced models, reviving concerns about future AI-chip and data-center demand. - No clear company-specific announcement explaining the September 28, 2026 decline surfaced in the search. - Broader risk-off sentiment also weighed on markets as U.S.-Iran tensions pushed oil higher and rising bond yields pressured equities.