Poland has floated a “Copper Valley” proposal built around a new copper mine in southwestern Poland planned by Canada’s Lumina Metals, with the aim of doubling the country’s copper output from KGHM’s current level. Lumina surged 46% on its first day of trading on the Warsaw exchange, highlighting investor attention on Poland’s copper expansion. The development has strengthened expectations for growth in global copper supply and is seen as a short- to medium-term upside catalyst for spot and futures prices.