Constellation Energy (CEG) Stock: Calpine Deal Milestones, Nuclear Restart Momentum, and What to Watch Next Week (Updated Dec. 13, 2025)
Constellation Energy Corporation wrapped up a volatile week in U.S. markets with a sharp Friday pullback—yet the bigger story remains the same: investors are trying to price a nuclear-heavy power producer at the center of two giant forces colliding at speed—AI-driven electricity demand and a regulatory/financing chess match around Constellation’s planned Calpine acquisition. Reuters