Tight MCU supply may drive prices higher again in 2H26

Overview

This report is Morgan Stanley's event commentary on the Greater China technology semiconductor sector, focusing on MCU spot prices and supply tightness. The report notes that June spot prices for STMicro's 32-bit MCU and GigaDevice's 32-bit MCU were flat month on month, but STMicro has already notified customers of another price increase effective June 28, 2026. The analysts believe MCU prices still have room to rise further in 2H26, although the main drivers are tight mature-process capacity and higher foundry costs rather than a meaningful recovery in end demand.

Core views

The key views are: first, MCU supply tightness may continue through 2H26, as mature-process foundries allocate more capacity to AI power-related applications and incremental capacity remains limited; second, end-demand remains broadly stable, and stronger distributor demand mainly reflects low inventories and expectations of further price increases; third, future spot-price increases are more supply- and cost-driven; and fourth, on stock selection, the report prefers large MCU maker GigaDevice and WiFi MCU maker Espressif because their long-term edge-AI opportunities are clearer; fifth, it remains Underweight on Nuvoton and wants to wait for gross margin recovery before turning more constructive.

Analysis framework

The report combines industry supply-demand tracking, spot price monitoring, company ratings, and a relative-return framework. The short-term analysis centers on MCU spot prices, foundry capacity allocation, inventories, and end-demand; at the company level, it incorporates Morgan Stanley's relative rating system, price target history, and a residual income valuation model.

Methodology notes

• Valuation methodsResidual income model

  residual income model

  In the company valuation section, the report uses a residual income model as the base-case valuation method and lists key assumptions such as cost of equity, beta, risk-free rate, risk premium, dividend payout ratio, mid-cycle growth rate, and terminal growth rate.

• ratingMorgan Stanley relative rating system

  relative rating system

  Morgan Stanley uses Overweight, Equal-weight, Not-Rated, and Underweight as relative ratings to assess risk-adjusted performance versus the average total return of covered stocks over the next 12 to 18 months.

• industry_viewMorgan Stanley industry view

  industry view

  Industry views include Attractive, In-Line, and Cautious, and are used to express the expected relative performance of the covered industry versus the relevant market benchmark over the next 12 to 18 months.

Asset mapping & comparison

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

• GigaDevice Semiconductor Beijing Inc (603986.SS)

  A large MCU maker, explicitly listed by the report as one of the preferred names.

  Strengths

  It may benefit from tight MCU supply, potential spot-price upside, and long-term edge-AI opportunities; Morgan Stanley rates it Overweight.

  Weaknesses

  The price increase is driven more by supply and costs than by better end demand, so weak demand could limit earnings leverage.

  Comparison

  Compared with Nuvoton, the report is more positive on GigaDevice; it is also one of the preferred names alongside Espressif.

  Risks

  The MCU upcycle ends earlier than expected, severe price erosion, slower-than-expected localization of China-made MCUs, weaker-than-expected progress in new customers or the automotive/BMC businesses, and margin pressure from intensifying competition.

• Espressif Systems (688018.SS)

  A WiFi MCU maker, explicitly listed by the report as one of the preferred names.

  Strengths

  It has WiFi MCU exposure and long-term edge-AI opportunities, and is rated Overweight.

  Weaknesses

  Near-term end-demand has not improved materially, and the price driver is mainly on the supply side.

  Comparison

  It is a preferred MCU-related name alongside GigaDevice; the report is more constructive on it than on Nuvoton.

  Risks

  Slower-than-expected localization of China-made MCUs, weaker-than-expected new customer progress, and margin erosion from intensifying competition.

• Nuvoton Technology Corporation (4919.TW)

  An MCU-related company that the report keeps at Underweight.

  Strengths

  Upside could emerge if the MCU upcycle lasts longer, China-made MCU localization accelerates, or the automotive and BMC businesses provide stronger traction.

  Weaknesses

  The report explicitly says it will wait for gross margin recovery before turning more constructive, and it currently remains Underweight.

  Comparison

  The report is more cautious on Nuvoton than on GigaDevice and Espressif.

  Risks

  The MCU upcycle ends early and severe price erosion occurs, China-made MCU localization is slower than expected, the automotive and BMC businesses underperform, and intensifying competition compresses margins.

Key data

• STMicro 32-bit MCU June spot priceRmb12.8Flat month on month in June; the tax-inclusive basis is not further broken out in the main text.
• GigaDevice 32-bit MCU June spot priceRmb8.5Flat month on month in June.
• Effective date of STMicro's latest price increase2026-06-28This is the second price increase in 2026; the prior round was announced in March and implemented in April.
• GigaDevice Semiconductor Beijing Inc rating and priceOverweight; Rmb586.04Rating date: 2025-05-15; price date: 2026-06-18.
• Espressif Systems rating and priceOverweight; Rmb122.40Rating date: 2023-05-15; price date: 2026-06-18.
• Nuvoton Technology Corporation rating and priceUnderweight; NT$196.50Rating date: 2025-11-10; price date: 2026-06-18.
• Latest disclosed GigaDevice price target history2026-05-28: 585From the price target history table; currency context is CNY.
• Latest disclosed Espressif price target history2026-04-17: 98From the price target history table; currency context is RMB.

Impact & implications

If supply tightness persists, MCU spot prices may continue to rise in 2H26, benefiting MCU design companies with scale, product competitiveness, or edge-AI opportunities. However, because consumer and industrial demand have not improved materially, the sustainability of price increases depends on mature-process supply constraints, foundry cost pass-through, and the inventory cycle rather than a broad demand recovery. For investors, the report emphasizes stock selection rather than a blanket bullish view on the sector.

Risks

• The MCU upcycle ends earlier than expected and severe price erosion occurs.
• China-made MCU localization progresses more slowly than expected.
• Automotive, BMC, or new-customer traction is weaker than expected.
• Intensifying competition pressures or erodes margins.
• Consumer and industrial end-demand does not improve meaningfully, leaving price increases without demand-side support.
• Changes in mature-process capacity allocation or new capacity additions could ease supply tightness.

What to watch

• Whether STMicro's price increase is implemented after June 28, 2026, and whether other vendors follow.
• Whether MCU spot prices rise again in 2H26.
• The persistence of mature-process foundry capacity shifting toward AI power-related applications.
• Whether distributor inventory levels and restocking behavior continue.
• Whether consumer and industrial end-demand shows real improvement.
• Changes in gross margin, localization progress, and new-business traction for GigaDevice, Espressif, and Nuvoton.