AI Semiconductor Stocks Plunge, Clear Divergence in Chipmakers and Equipment

TL;DR

• Global selloff in AI semiconductor names (NVIDIA, Micron, etc.) and concerns over fund raising issues were reported. Korean semiconductor and equipment stocks show differentiated moves. (collected 2026-07-31 08:20 KST)
• As of final close on July 30, KOSPI 5,593.56(-1.23%), KOSDAQ 644.78(-2.70%). Watch inflows/outflows in chip and equipment sectors after open, and mixed moves in HBM-related names.

What happened

Overnight, global markets saw a sharp decline centered on AI semiconductor names. Signal bundles cited drops in NVIDIA and Micron and noted large market cap declines among companies leading the AI semiconductor supply chain. At the same time, reports of fundraising difficulties at some funds weakened sentiment toward the sector. This produced differentiated reactions among Korean chipmakers and equipment stocks.

HBM-related names showed mixed movements, and while Samsung Electronics exhibited relative strength, SK Hynix and equipment makers moved differently. Volatility among large U.S. tech names also affected risk appetite on the Korean market.

By the numbers

• 2026-07-30 final close: KOSPI 5,593.56(-1.23%), KOSDAQ 644.78(-2.70%), collected 2026-07-31 08:20 KST.
• Recent sector flow (US): IT and semiconductors fell 7.60% in a large drop. Korea sectors (most recent trading day): IT·semiconductors -2.31%, Materials +2.49%, Utilities +1.98%, Real Estate +1.82%.
• Headline summary: ‘NVIDIA and Micron stock plunge’, ‘Large market cap losses for companies leading the AI semiconductor supply chain’, ‘NVIDIA price drop despite steady demand assessments’, among concurrent reports.

The data imply that the large US IT and semiconductor decline transmitted downward pressure to Korea’s IT and semiconductor sector, while domestically HBM and equipment subgroups showed clear stock-by-stock divergence. With KOSPI and KOSDAQ already closing lower yesterday, early open moves are likely to be sensitive to global news flow and net flows.

PickStock checkpoints

• Net foreign and institutional flows at open: check how the global semiconductor headwinds reflect in foreign flows. (Cross-check with real-time flow data)
• Within-semiconductor differentiation: monitor swings among HBM-related names and equipment stocks. Signal bundles reported mixed flows.
• Large caps vs small caps: Samsung Electronics and SK Hynix showed relative strength, while some equipment and small-cap AI names may exhibit greater volatility.
• Fund and ETF flows: reports flagged fundraising issues for AI and semiconductor funds. Check ETF and active fund flow data.
• Contagion risk from overseas: watch for additional negative headlines on NVIDIA and other global large caps, and monitor overnight and early domestic session news.

Today’s session will likely be decided by immediate reactions to global AI and semiconductor headlines combined with domestic net flows. Use chart technicals for sector and stock technical indicators if needed.

This article is for information only and is not investment advice.