⚙️ Micron's Sharp Decline and China's Pursuit: HBM4 Will Decide the Winner - 2026.07.30

Hi, this is Dotori, here to break down the big picture of the industry step by step. Recently, the semiconductor sector in the New York stock market has faced intense selling pressure, leading to a painful short-term correction for Micron's stock.

🏭 A Decline Driven by Macro and Micro Factors

Looking at the numbers, Micron closed at $820.53 on July 28, a drop of -8.85%, and fell further to $743.71 on the 29th, a decline of -9.36%. The sell-off across AI-related semiconductors is cited as the primary cause ^[3]. Other tech stocks like AMD also showed a simultaneous sharp decline ^[4].

Digging deeper, there is a risk factor from China at play. News broke that China's largest DRAM producer, ChangXin Memory Technologies (CXMT), has listed on the Shanghai Stock Exchange to raise massive capital ^[6]. As China's drive for semiconductor self-sufficiency intensifies, it has dealt a market shock to Micron ^[1]. We are seeing macro-level AI sector adjustments and micro-level competitor growth interlocking like gears.

⚙️ The HBM4 Production Race, Where is the Real Battleground?

Despite this instability, what we must look at structurally is the next growth engine. Analysis suggests that the three major companies—Samsung Electronics, SK Hynix, and Micron—have entered a race to reach HBM4 mass production ^[2].

In the massive relay of the supply chain, the key variables determining their success are 'yield' and 'supply capacity' ^[2]. Following the stock adjustment in July, the market is also weighing the attractiveness of AI memory stocks, including Micron ^[5].

📚 Checking Differentiated Benefits Across the Value Chain

This connection is key. Amid the variables of macro adjustments and China's pursuit, here is a summary of differentiated benefits in the value chain:

• 1st Priority: Memory makers that quickly stabilize advanced processes, especially HBM4 yield and supply capacity. The question is what kind of report card Micron will produce here.
• 2nd Priority: Key materials, parts, and equipment (SBU) companies essential to the AI memory expansion relay of these makers.
• 3rd Priority: Areas with a high proportion of general (legacy) memory that could be directly exposed to the pursuit risk of China's CXMT.

Dotori believes that HBM4 yield and supply capacity are the essential gears that will determine the winner of the next cycle. Beyond short-term price volatility, this is a moment to question how Micron will narrow or widen the gap with its competitors in advanced processes and how the structural changes will unfold.

📰 Reference News (5)

1

Micron plunges 8.9%... Market shock from China's semiconductor self-sufficiency - Global Economic

글로벌이코노믹 · 2026.07.29

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2

Samsung Electronics, SK Hynix, Micron in a race for HBM4 mass production... 'Yield and supply capacity' are the battlegrounds - Newsis

뉴시스 · 2026.07.29

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4

[NY Stock Market] Semiconductor stocks Micron and AMD plummet by 8%... Dow Jones up 537P - Global Economic

글로벌이코노믹 · 2026.07.28

📰 View original

5

Better Artificial Intelligence (AI) Memory Buy: Micron Technology vs. Sandisk After the July 2026 Sell-off - Yahoo Finance

Yahoo Finance · 2026.07.29

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📺 Reference Videos (1)

6

YouTube

China's semiconductor pursuit... Is it a signal of a peak-out? / YTN

▶ YTN·2026.07.28