Sigma Lithium (SGML) has moved back into focus after agreeing to sell 150,000 tonnes of high purity lithium fines at US$140 per tonne, with additional volume and customer prepayments tied to resumed production.

These contracts arrive after a volatile period for the stock, with a 7 day share price return of 9.25% but a 30 day share price decline of 19.53%. The 90 day share price return of 120.30% and 1 year total shareholder return of 18.25% contrast with a 3 year total shareholder return decline of 54.72%, suggesting momentum has picked up recently from a still mixed longer term picture.

If Sigma Lithium’s rebound has caught your attention, it could be a good moment to broaden your view and check out 30 best rare earth metal stocks as another way to research opportunities in the broader battery materials space.

With production back online, fresh contracts in place and the share price still sitting below the average analyst target of US$17.17, you have to ask: is Sigma Lithium still undervalued here, or is the market already pricing in future growth?

Most Popular Narrative: 24.8% Undervalued

With Sigma Lithium last closing at $13.35 against a narrative fair value of $17.75, the current setup frames a clear valuation gap for investors to weigh.

Strategic progression on Grota do Cirilo Phase 2 and planned Phase 3 expansion is expected to nearly triple production to 120,000 tonnes LCE by 2027, leveraging existing infrastructure for low incremental CapEx and resulting in long term revenue growth and improved operating margins from economies of scale.

Curious what kind of revenue ramp and margin shift could justify that higher fair value, and how long it might take to show up in earnings and cash flow? The key assumptions in this narrative lean heavily on growth, profitability and the multiple the market might be willing to pay for those future results.

Result: Fair Value of $17.75 (UNDERVALUED)

However, there is still clear execution risk here, including potential delays to Phase 2 ramp up and ongoing exposure to lithium price swings affecting contract economics.

Another Angle: Price To Sales Sends A Different Signal

The 24.8% gap to the $17.75 fair value may look appealing, but the current P/S of 10.7x is far higher than the US Metals and Mining average of 2.6x and also above a fair ratio of 1.5x. That is a wide spread, which raises the question of whether expectations are already too high.

Build Your Own Sigma Lithium Narrative

If you see the data differently or simply want to stress test your own view, it only takes a few minutes to build a custom thesis and Do it your way.

A great starting point for your Sigma Lithium research is our analysis highlighting 2 key rewards and 3 important warning signs that could impact your investment decision.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.