Quanta Services is trading at $514.72, down 10.57%, as concerns about future data-center rules weigh on AI-power contractors.
- Peers also fell as investors questioned whether customers might pause projects.
- The decline coincides with broad market weakness: the S&P 500 is down 2.52% and the Nasdaq is down 4.10%.
- Quanta recently raised its 2026 outlook; available reporting points to industry and market concerns, not a new company-specific negative catalyst.