High-bandwidth memory (HBM) is a type of high-speed RAM used in AI and high-performance computing applications.

Were other companies affected besides Micron?

Yes, other AI chip stocks like NVIDIA (NVDA) were also impacted by the report.

Micron (MU) Shares Plunge 13.6% on Report of SK Hynix HBM Expansion Slowdown

Micron (MU) shares fell 13.6% after a report that SK Hynix is slowing its high-bandwidth memory (HBM) expansion, rattling the AI-chip complex.

June 24, 2026

2 min read

Source: StockStory

Key Numbers

stock decline

13.6%

Shares of memory chip maker Micron (NASDAQ:MU) fell 13.6% in the afternoon session after a report that South Korea's SK Hynix is slowing its high-bandwidth memory (HBM) expansion, rattling the AI-chip complex.

Potential Causes

The report suggests that SK Hynix, a key competitor in the HBM market, may be slowing its expansion plans, potentially reflecting weakening demand for high-performance memory chips used in AI applications. Since Micron relies heavily on the growth of the HBM market, any sign of a slowdown in this segment negatively impacts the stock.

Context

Prior to this decline, Micron's stock had experienced volatility over the past month, influenced by demand and pricing expectations for memory chips. This move comes at a sensitive time as investors closely watch for any signs of weakening demand for AI chips.

Similar Moves in the Sector

The decline was not limited to Micron; other chip stocks like NVIDIA (NVDA) also felt the impact, indicating a broader negative sentiment in the sector.

Frequently Asked Questions

Micron stock fell 13.6% after a report that SK Hynix is slowing its HBM expansion, raising concerns about AI chip demand.

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This article was rewritten in Wrqti's editorial style based on information from the original source above. Content is informational only — not investment advice.