BofA Upgrades Sigma Lithium, Vale on AI Data Center Demand
Bank of America raised both mining stocks to Buy, citing copper and lithium demand from AI infrastructure. SGML target rises to $17 for 44% upside.
Bank of America upgraded two mining stocks this week on the same thesis: AI data centers need enormous amounts of copper and lithium, and the supply isn't keeping up.
Sigma Lithium moved from Neutral to Buy with a price target increase from $14 to $17, implying 44% upside. Vale also got bumped to Buy from Neutral, with the target rising from $18 to $19.
The upgrades come as the mining sector shows signs of a turnaround after a brutal 2025.
The Bull Case
The math is straightforward. A single AI data center requires roughly 2.5x the copper wiring of a traditional facility. Battery backup systems demand lithium. The hyperscaler capex wave running at $650 billion annually means sustained demand for both commodities.
Supply can't respond quickly. New copper mines take 7-10 years to develop. Lithium projects face permitting delays and ESG scrutiny. Meanwhile, Microsoft, Amazon, and Google are breaking ground on facilities that won't reach full power for years.
Bank of America estimates copper demand from data centers alone will grow 15% annually through 2030. Lithium demand for grid-scale storage at these facilities adds another layer.
Sigma Lithium's Catalyst
The upgrade coincides with company-specific news. Sigma Lithium signed a $100 million bank guarantee with a major Brazilian lender to fund its Greentech Industrial Plant 2 expansion.
The project will nearly double production capacity from 270,000 tonnes to 520,000 tonnes of lithium oxide concentrate annually. Management says the expansion positions them to capture the battery storage opportunity that AI infrastructure creates.
| Metric | Current | Post-Expansion |
|---|---|---|
| Annual Capacity | 270,000 tonnes | 520,000 tonnes |
| Customers | EV manufacturers | EV + Grid Storage |
| Expansion Funding | $100M guarantee | Secured |
The stock traded at $11.83 before the upgrade. BofA's $17 target assumes the expansion executes on schedule and lithium prices stabilize above current levels.
Vale's Copper Pivot
Vale is better known for iron ore, but its copper operations are increasingly relevant. The company is Brazil's largest copper producer and has mines in Canada through its base metals division.
The upgrade reflects copper's improving supply-demand dynamics more than Vale-specific catalysts. Global copper inventories are at multi-year lows. Prices have risen 18% year-to-date as electric vehicle production and data center construction compete for limited supply.
Iron ore, Vale's core business, faces headwinds from China's property slowdown. But copper provides diversification. BofA's thesis is that the copper revenue stream deserves a higher multiple given the AI-driven demand outlook.
Other Metals Moves
Bank of America wasn't alone in turning positive on mining. Goldman Sachs initiated coverage on Freeport-McMoRan with a Buy rating and $70 price target, citing similar copper demand projections.
The sector rotation has legs. The SPDR S&P Metals & Mining ETF (XME) is up 12% year-to-date, outperforming the S&P 500 by 14 percentage points. Money is flowing into physical-asset plays that benefit from AI infrastructure spending.
What to Watch
For Sigma Lithium, execution on the Plant 2 expansion matters. Any construction delays or cost overruns would undercut the growth story. The stock has been volatile, swinging 30% in both directions over the past six months.
For Vale, China remains the wildcard. Iron ore generates most of the company's profit. If Chinese steel demand deteriorates further, the copper thesis won't be enough to offset the decline.
The broader mining sector theme depends on AI capex remaining elevated. Any pullback in hyperscaler spending would hit copper and lithium demand simultaneously. For now, the spending shows no signs of slowing.