Century Aluminum stock jumps to $45.89, but GuruFocus flags 97% overvaluation

Stock image for referential purposes only

Century Aluminum shares rose 4.4 per cent to USD 45.89 on August 27, extending a strong 2026 rally, but GuruFocus' GF Value model puts the stock's estimated intrinsic value at just USD 23.25.

Century Aluminum Co's stock is moving in two very different directions depending on which metric you look at. 

On August 27, shares of the US aluminium producer gained 4.4 per cent to USD 45.89, putting the stock up 17.1 per cent year to date and an impressive 102.2 per cent over the past year.

Yet, despite the strong momentum, GuruFocus' valuation model considers Century Aluminum considerably overvalued at its current price.

The platform's GF Value stands at USD 23.25, compared with the stock's USD 45.89 price. That represents a 97.4 per cent premium to its estimated GF Value, highlighting the gap between the market price and the model's assessment of the company's intrinsic value.

To know the production, demand and consumption forecasts on bauxite and alumina, explore the report "Global Bauxite & Alumina Market Forecast to 2036: Supply–Demand, Trade Flows & Price Outlook"

Strong momentum meets a valuation warning

Century Aluminum's recent share-price performance has been one of the strongest aspects of its investment profile.

The stock currently sits within a 52-week range of USD 20.91 to USD 70.43, while its 102.2 per cent one-year gain reflects substantial investor momentum.

GuruFocus' GF Score is 62 out of 100, placing Century Aluminum in the above-average category. The company's strongest individual score is its Momentum Rank of 9/10, reflecting its powerful recent share-price performance. Its Financial Strength rating stands at 7/10, suggesting a relatively solid financial position.

However, these positives are accompanied by a much weaker Valuation Rank of 1/10.

That combination creates an important distinction for investors: Century Aluminum is performing strongly in the market, but that does not necessarily mean the shares are attractively valued.

Why the low P/E does not settle the valuation question

Century Aluminum's valuation picture becomes more complicated when looking at its earnings multiple.

The stock currently trades at a trailing P/E ratio of 7.9 times, compared with a five-year median P/E of 12.8 times. That means its current P/E is around 38 per cent below its historical median, which could normally be interpreted as evidence that the stock is trading at a discount to its historical valuation.

The model incorporates factors including historical trading multiples, past business growth and future performance expectations. On that basis, it considers the current USD 45.89 share price substantially above its estimated intrinsic value of USD 23.25.

The conflicting signals illustrate why a single valuation metric may not provide the complete picture of a cyclical materials stock.

Explore primary aluminium suppliers, product listings and trade opportunities on AL Biz

Insider selling: Another warning signal?

According to the GuruFocus analysis, seven gurus currently hold CENX shares, with four increasing their positions and five trimming their stakes in recent quarters.

Insider activity is more concerning from the valuation perspective. Insiders reportedly sold USD 626 million worth of stock over the past 12 months, with no recent insider purchases.

While insider selling does not necessarily mean a stock is headed for a decline, the absence of recent purchases alongside substantial selling adds another cautionary signal when considered together with the company's low valuation ranking.

Financial strength offers a counterpoint

Century Aluminum's 7/10 Financial Strength rating is one of the stronger components of its GF Score, while its overall score of 62/100 places it above average compared with peers.

Its 9/10 Momentum Rank is also a clear indication that the market has been rewarding the stock, despite the concerns surrounding its valuation.

That leaves investors facing a familiar dilemma with a rapidly rising commodity stock: strong momentum can continue to push a share price higher even when valuation metrics suggest it has moved ahead of its underlying fundamentals.

For now, the market is rewarding CENX with strong momentum. GuruFocus, however, is asking whether investors have already priced in too much of the good news. 

Unlock key insights from leading companies and experts across the aluminium ecosystem with our e-Magazine - Mine to Market: Aluminium Producers & Manufacturers 2026