Everyone’s watching artificial intelligence (AI) chips, rare earths, and semiconductors — but the real story might be the one metal at the heart of all these investing themes: Copper. Known as “Dr. Copper” for its historical ability to “diagnose” the health of the global economy, copper is becoming the heartbeat of the energy transition, AI infrastructure, and clean-tech growth. More News from Barchart And while market headlines focus on big movers like Nvidia (NVDA) and Lithium Americas (LAC), copper ( ...