High-bandwidth memory (HBM) is a type of high-speed memory used in AI processors.

Were other companies in the sector affected?

Yes, shares of NVIDIA and AMD also declined in the same session.

KLA, onsemi, Nova Shares Fall on SK Hynix HBM Expansion Slowdown

Shares of KLA Corporation, onsemi, and Nova declined in afternoon trading following a report that South Korea's SK Hynix is slowing its high-bandwidth memory (HBM) expansion, unsettling the AI-chip sector.

June 23, 2026

2 min read

Source: StockStory

Shares of KLA Corporation (KLAC), onsemi (ON), and Nova Ltd. (NVMI) fell in afternoon trading on June 23, 2026, after a report that South Korea's SK Hynix is slowing its high-bandwidth memory (HBM) expansion. The development rattled the AI-chip complex.

Potential Causes

The report, published by Reuters, indicated that SK Hynix, a major producer of HBM used in AI processors, is scaling back its expansion plans. This may reflect a softening in expected demand for AI chips, negatively impacting companies in the supply chain.

Context

KLA, which provides semiconductor inspection equipment, declined by an unspecified percentage after the report. Onsemi, a power semiconductor maker, and Nova, which offers metrology equipment for semiconductors, also fell. These companies rely on strong demand from chipmakers like SK Hynix.

Similar Moves in the Sector

The broader sector was negatively affected, with shares of other AI-related companies such as NVIDIA and AMD also declining in the same session. This suggests that concerns extend beyond a single company and may reflect a shift in market expectations for the AI sector.

Frequently Asked Questions

They fell 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.