US Aluminum Stocks Plunge 5% Amid News

On the New York Stock Exchange, shares of Century Aluminum Co. (NYSE: CENX) closed at $62.10 on April 17, down 5.35% from the previous trading day.

The company’s market capitalization stands at approximately $6.1 billion (about KRW 8 trillion), with roughly $310 million (around KRW 400 billion) wiped out in a single day.

Trading volume reached about 2.1 million shares, reflecting a wave of short-term profit-taking.

Century Aluminum announced that it began first molten-metal production at the expanded section of its Mount Holly, South Carolina, smelter, boosting capacity by roughly 10%.

Earlier in February, it reported its fourth-quarter and full-year 2025 results, reaffirming plans to invest in a new eco-friendly smelter and pursue further expansion in the U.S.

Headquartered in Chicago, Century Aluminum is a leading U.S. primary aluminum producer, operating domestic smelters and a carbon-anode production facility in the Netherlands.

Most recently, the company has launched a project to build a 750,000-ton-per-year eco-friendly smelter in Enola, Oklahoma, along with expansion investments to grow its supply of low-carbon aluminum.