Morgan Stanley raises Mitsui Mining & Smelting target price to 56,000 yen

Overview

This report published by Morgan Stanley takes a bullish view on Mitsui Mining & Smelting's growth potential amid the AI infrastructure wave, particularly its High Voltage Low Loss (HVLP) copper foil for AI servers and Ultra-Thin (MicroThin) copper foil for AI transceivers. Given the strong expectations for AI-related copper foil demand growth, the institution rolled the base year from F3/27 to F3/28 and significantly raised the target price from 37,000 yen to 56,000 yen, while maintaining an 'Overweight' rating. The report believes that with the increase in AI transceiver layers and speed improvements, MicroThin copper foil will see rapid volume growth, becoming the core profit driver for the company in the coming years.

Core views

AI-related copper foil business is becoming the core growth driver for Mitsui Mining & Smelting. The report defines VSP (HVLP) copper foil and MicroThin copper foil used in DRAM (DDR5) as AI-related products. Data shows that the recurring profit (RP) contribution from these products will surge from 18 billion yen in F3/26 (13% of total RP) to 85 billion yen in F3/29 (50% share), representing a compound annual growth rate of 50% over the period. In terms of specific product forecasts, the institution is extremely optimistic about the application of MicroThin in AI transceivers. Although the company's management assumes that monthly sales volume of MicroThin for AI transceivers will only increase to 300 km² by 2030, Morgan Stanley predicts this figure will rapidly expand from approximately 200 km² in F3/26 to 800 km² in F3/29. This forecast is based on the global team's judgment of a 99% compound annual growth rate in AI transceiver shipments from 2025 to 2028, as well as the logic that PCB layer counts increase with speed improvements (from 400G to 1.6T). For HVLP copper foil, the institution believes that Mitsui Mining & Smelting is the only manufacturer with mass production capabilities for HVLP5, creating a high technology barrier, and the demand prospects for NVIDIA Rubin series are vast. On the valuation front, the institution used a Sum-of-the-Parts (SOTP) method. As the AI-related copper foil business is expected to have a profit compound growth rate of 60% during F3/27-29, far exceeding the supply chain average, the copper foil business is assigned a price-to-earnings ratio (PE) of 36.5x, representing a 20% premium over the average PE (36.6x) of Copper Clad Laminate (CCL) and PCB manufacturers. Other businesses are assigned a 15.5x PE. This results in an overall PE multiple of 29.0x, corresponding to the F3/28 estimated EPS of 1,942 yen, yielding a target price of 56,000 yen.

Analysis framework

The institution's analytical approach follows the logical chain of 'verify technical moat - quantify demand breakdown - revalue valuation'. First, by confirming Mitsui Mining & Smelting's exclusive mass production capability in HVLP5, it establishes the company's competitive moat in the high-end copper foil market. Second, it delves into the evolution path of AI hardware, pointing out that as AI transceivers transition from 400G to 1.6T, the increase in PCB layer counts will directly drive the unit usage of MicroThin copper foil, thereby converting macro AI computing power growth into specific copper foil area demand (from 200 km²/month to 800 km²/month). Finally, in terms of valuation methodology, it abandons the traditional cyclical metal stock valuation logic, instead referencing the valuation system of the high-growth CCL/PCB supply chain, and reflecting the higher growth certainty by applying a 20% premium, thus achieving an upward shift in the valuation center.

Methodology notes

• Valuation MethodSOTP Sum-of-the-Parts Valuation

  SOTP Sum-of-the-Parts Valuation Method

  Assigns different valuation multiples to the company's distinct business segments (e.g., high-growth copper foil business vs. traditional metals business) and sums them to obtain the company's total value. This method more accurately reflects the true value of high-growth businesses in a diversified company, avoiding valuation drag from lower-growth segments.

• Industry/Industrial Analysis FrameworkUpstream-Downstream Industry Chain Transmission

  Transmission of AI hardware evolution to upstream materials

  By analyzing the technological trend where downstream AI chip speed improvements (400G->1.6T) lead to increased PCB layer counts, it deduces the logical necessity for increased upstream MicroThin copper foil usage. This is a typical analytical paradigm of transmission from terminal application changes to upstream raw material demand.

• Competitive & Strategy FrameworkMoat / competitive advantage

  Technical barrier and exclusive mass production capability

  Emphasizes that Mitsui Mining & Smelting is the only manufacturer achieving mass production of HVLP5. This technological exclusivity constitutes a deep moat, granting stronger pricing power and market share protection against competitors, thereby supporting a higher valuation premium.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Mitsui Mining & Smelting (5706.T)

  Beneficiary: As the only manufacturer with mass production capabilities for HVLP5, it directly benefits from the explosion in demand for high-frequency high-speed copper foil from AI servers and the multiplier effect on MicroThin copper foil usage from AI transceivers.

  Strengths

  Extremely high technical moat (exclusive mass production of HVLP5), ultra-high market share, fast profit growth rate for AI-related products (CAGR 50%).

  Weaknesses

  Traditional metals business is dragged down by lead price spreads and energy costs, short-term performance is affected by inventory valuation factors.

  Comparison

  Compared to CCL and PCB manufacturers in the supply chain, Mitsui Mining & Smelting has a more unique technological monopoly at the upstream material end, thus commanding a 20% valuation premium.

  Risks

  Weaker macroeconomic conditions leading to lower-than-expected demand for semiconductor memory and AI server PCBs; significant appreciation of the Yen; decline in commodity prices such as zinc.

Key data

• Target Price56,000 yenSignificantly raised from the previous 37,000 yen, implying 16% upside
• F3/29 AI Copper Foil Profit Share50%Significantly increased from 13% in F3/26, becoming the mainstay
• MicroThin Monthly Sales Volume Forecast (F3/29)800 km²Primarily for AI transceivers, representing a 3-fold increase from 200 km² in F3/26
• Copper Foil Business PE Multiple36.5xA 20% premium is applied, reflecting high growth expectations
• F3/28 Forecast EPS1,942 yenUsed as the basis for valuation calculation

Impact & implications

The research report believes that Mitsui Mining & Smelting is transitioning from a traditional cyclical metal processing company to a key material supplier for AI infrastructure. As AI-related copper foil profit share exceeds half, the volatility of its earnings will become less correlated with traditional metal prices and more correlated with the AI capital expenditure cycle. This implies that the market should reassess its valuation logic, assigning it a growth stock valuation similar to semiconductor material or high-end electronic component companies, rather than a traditional resource stock valuation. Furthermore, the company's exclusive position in the HVLP5 field gives it strong bargaining power in the supply chain, allowing it to potentially earn excess profits when the industry is in short supply.

Risks

• Macroeconomic conditions weaker than expected, leading to reduced demand for semiconductor memory and AI server PCBs
• Yen appreciates more than expected
• Decline in commodity prices such as zinc
• Deterioration in lead raw material price spreads and rising energy costs impacting metals segment profits

What to watch

• F3/27 Q1 earnings results and guidance revisions
• Copper foil statistics from Malaysia and domestic sources
• Price increase pass-through along the copper foil supply chain (e.g., CCL and PCB manufacturers)
• Announcements regarding HVLP and MicroThin capacity expansion plans