The $500M investment from the US Department of Energy is a significant financial boost for Century Aluminum, enabling the company to undertake a major expansion with the construction of a new green aluminum smelter. This project not only aligns with global trends towards sustainability and decarbonization but also positions Century Aluminum at the forefront of the U.S. aluminum industry's expansion. The potential doubling of the U.S. primary aluminum industry's size signifies a substantial increase in Century Aluminum's production capacity and market share, likely leading to increased investor confidence and a positive impact on the company's stock price in the short term.