MCU Supply Tightness Could Drive Prices Higher in 2H26

Overview

This report focuses on the MCU value chain within Greater China Technology Semiconductors. The core view is that June spot prices for major 32-bit MCUs were flat for now, but STMicro issued another price increase notice. Combined with mature-node capacity shifting toward AI power-related applications and limited new capacity additions, MCU supply tightness may persist into 2H26 and drive prices higher again. The report also notes that consumer and industrial end demand has not improved significantly, so this round of price increases appears more supply- and cost-driven rather than demand-driven.

Core views

The report's core views are as follows: first, MCU spot prices are flat in the near term but price increase expectations remain, and STMicro's second price adjustment this year reinforces the signal of higher prices; second, tight mature-node foundry capacity will continue to affect MCU designers, especially as AI power-related applications crowd out capacity; third, end demand is basically stable month on month, and distributor demand improvement mainly comes from low inventory and concerns about further price increases in 2H26; fourth, in terms of investment selection, the report prefers larger MCU manufacturer GigaDevice and Espressif, which has long-term opportunities in WiFi MCU and edge AI, while remaining cautious on Nuvoton.

Analysis framework

The report combines spot market price tracking, supply chain capacity allocation, channel inventory, and end-demand observations to judge MCU price trends, and uses Morgan Stanley's coverage framework, stock ratings, and target price history to express investment preferences. The valuation section mainly uses the residual income model and sets key assumptions such as cost of equity, payout ratio, medium-term growth rate, and terminal growth rate for different companies.

Methodology notes

• Valuation MethodResidual income model

  Discounting a company’s future residual income to derive base-case value, which is then used as the basis for the target price.

  The report discloses residual income model assumptions for different names, including cost of equity, beta, risk-free rate, risk premium, payout ratio, medium-term growth rate, and terminal growth rate.

• Rating SystemMorgan Stanley Relative Rating System

  Overweight, Equal-weight, and Underweight ratings are relative to the average total return of the analyst's coverage universe.

  Overweight means the risk-adjusted total return over the next 12-18 months is expected to be above the coverage universe average; Equal-weight means roughly in line; Underweight means below the industry average.

• Industry ViewIndustry View

  Attractive means the analyst believes the covered universe will look attractive relative to the relevant broad market benchmark over the next 12-18 months.

  The industry view in this report is Attractive, reflecting a relatively positive view on the Greater China Technology Semiconductors coverage universe.

Asset mapping & comparison

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

• GigaDevice Semiconductor Beijing Inc (603986.SS)

  A large MCU manufacturer; the report explicitly favors it.

  Strengths

  Benefits from MCU supply tightness, domestic substitution, and the scale advantages of a large player; the coverage table shows rating O and target price Rmb586.04.

  Weaknesses

  If the MCU upcycle ends earlier than expected or price erosion is severe, earnings upside may be pressured.

  Comparison

  Compared with smaller players or names whose gross margins still need recovery, GigaDevice is more favored in the report.

  Risks

  MCU domestic substitution slows versus expectations, automotive and BMC businesses provide insufficient lift, and intensifying competition compresses margins.

• Espressif Systems (688018.SS)

  A WiFi MCU maker; the report is constructive on its long-term edge AI opportunity.

  Strengths

  Has long-term opportunities in WiFi MCU and edge AI; the coverage table shows rating O and target price Rmb122.40.

  Weaknesses

  Still affected by sluggish end-market demand and the competitive environment.

  Comparison

  It ranks alongside GigaDevice in the report's preference, but the investment case is more focused on WiFi MCU and edge AI.

  Risks

  Slower-than-expected pace of domestic MCU substitution in China, weaker-than-expected new customer wins, and margin erosion from intensifying competition.

• Nuvoton Technology Corporation (4919.TW)

  The report keeps it at Underweight and will wait for gross margin recovery before turning more constructive.

  Strengths

  If the MCU upcycle lasts longer, domestic substitution accelerates, and automotive and BMC businesses provide stronger lift, there could be upside.

  Weaknesses

  The report remains cautious on it for now, with gross margin recovery as the key watch item.

  Comparison

  Compared with GigaDevice and Espressif, Nuvoton has lower investment preference in this report.

  Risks

  MCU cycle ends earlier than expected, severe price erosion, slower-than-expected domestic substitution, weaker-than-expected traction from automotive and BMC businesses, and margin pressure from intensifying competition.

• STMicro 32-bit MCU

  Serves as an industry pricing reference sample and an external supply-side price signal.

  Strengths

  Another price increase during the year shows that industry supply and cost pressure remain.

  Weaknesses

  The report does not extend a primary investment rating to it.

  Comparison

  Its price adjustment can be used as a reference for the pricing environment for Greater China MCU makers such as GigaDevice.

  Risks

  If end-market demand weakens or supply improves, the sustainability of price increases may decline.

Key data

• STMicro 32-bit MCU June spot priceRmb12.8Flat month on month; STMicro notified customers of a new price adjustment effective 2026-06-28.
• GigaDevice 32-bit MCU June spot priceRmb8.5Flat month on month; the report expects spot prices could rise again in 2H26.
• STMicro year-to-date price increase count2 timesFollowing the price adjustment announced in March and implemented in April, the new adjustment effective 2026-06-28 marks the second price increase in 2026.
• Industry ViewAttractiveApplies to the Greater China Technology Semiconductors coverage universe.
• GigaDevice rating and target priceO, Rmb586.04The table shows GigaDevice Semiconductor Beijing Inc (603986.SS) with rating O and target price Rmb586.04.
• Espressif rating and target priceO, Rmb122.40The table shows Espressif Systems (688018.SS) with rating O and target price Rmb122.40.
• Nuvoton rating and target priceU, NT$196.50The table shows Nuvoton Technology Corporation (4919.TW) with rating U and target price NT$196.50.

Impact & implications

If MCU supply tightness persists, price increases will primarily benefit MCU design companies with scale, customer bases, and product competitiveness, and may improve revenue and gross margin expectations for related companies. However, because end demand has not accelerated meaningfully, the investment view needs to distinguish supply-driven price recovery from true demand expansion. The report is more constructive on the long-term opportunities for GigaDevice and Espressif, especially GigaDevice's large-scale advantages, WiFi MCU, and edge AI application expansion; for Nuvoton, it emphasizes that gross margin recovery remains a prerequisite for turning more constructive.

Risks

• The MCU upcycle ends earlier than expected and severe price erosion emerges.
• China's MCU domestic substitution progresses more slowly than expected.
• Automotive, BMC, or new customer business traction is below expectations.
• Intensifying competition puts pressure on or compresses gross margins.
• Consumer and industrial end demand remains weak, so price increases rely mainly on supply and costs, leaving insufficient demand support.
• If incremental mature-node capacity comes on line faster than expected, supply tightness may ease.

What to watch

• The implementation magnitude and customer acceptance of STMicro's new round of price adjustments starting 2026-06-28.
• Whether 2H26 MCU spot prices rise again, especially for STMicro and GigaDevice 32-bit MCUs.
• Whether mature-node foundry capacity allocation continues to tilt toward AI power-related applications.
• Whether channel inventory levels and distributor restocking behavior remain firm.
• Whether consumer and industrial end demand shifts from flat month on month to a meaningful improvement.
• Gross margin trends, customer expansion, and edge AI-related product progress at GigaDevice, Espressif, and Nuvoton.