AI rally crack explained: why Samsung and SK Hynix fell together

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The First Crack in the AI Rally Why Samsung and SK Hynix Fell Together

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Language EN · English KO · 한국어 Same topic, separately edited for each language.

HBM expectations, foreign flows, and the global chip selloff created pressure on Korea’s memory leaders.

Checked: 2026-07-03 10:23 KST

This article is educational market commentary based on public price data and public news flow. It is not investment, financial, or trading advice.

The AI memory story is still powerful. But stock prices do not move on good narratives alone. When Samsung Electronics and SK Hynix fell together, the market appeared to price in a combination of stretched expectations, foreign-flow pressure, global semiconductor weakness, and valuation sensitivity before waiting for the next round of earnings confirmation.

The short version

The joint decline looks less like a single-company event and more like a reset in expectations across the AI memory trade. HBM demand may remain structurally important, but the market is now asking whether enough of that good news had already been priced in.

Price-path visual · Samsung, SK Hynix, global semiconductor, memory, and KOSPI comparison indexed to 100

Price action shows a broader chip adjustment

Over the recent five-session window, Samsung Electronics moved -15.0%, SK Hynix moved -21.8%, SOXX moved -9.4%, Micron moved -19.6%, and the KOSPI moved -11.2%. That does not prove causality, but it does show that the Korean move happened during a wider semiconductor repricing.

Asset Latest close 5D 1M 3M 6M

Samsung Electronics 288,500 -15.0% -17.9% +52.1% +159.7%

SK Hynix 2,090,000 -21.8% -9.1% +133.0% +255.4%

SOXX 566.32 -9.4% -6.4% +67.3% +85.7%

Nvidia 194.83 -0.5% -12.6% +10.9% +3.9%

Micron 975.56 -19.6% -8.3% +165.2% +233.4%

KOSPI 7,467 -11.2% -13.6% +36.3% +81.7%

Mid-article visual · HBM demand, foreign flow, and valuation pressure

Four pressures behind the move

Pressure What it means What to check

AI overheating debate Expectations may have moved faster than fundamentals SOXX, NVDA, MU price path

HBM expectation gap Strong demand can still disappoint if the bar is too high HBM supply, margin, customer signals

Foreign flows Large Korean names can be sensitive to global risk positioning foreign net buying, FX, futures

Earnings confirmation Narrative needs quarterly proof guidance, inventory, DRAM pricing

Samsung and SK Hynix carry different burdens

Samsung is a broader company: HBM catch-up, commodity memory recovery, foundry, mobile, and non-memory all matter. SK Hynix is more directly associated with the AI memory premium and HBM leadership. That difference matters: the same selloff can reflect different expectations for each name.

check the numbers, not the noise

Numbers to watch

Metric Why it matters Where to check

HBM supply & customer comments Whether AI-memory expectations are actually confirmed Samsung/SK Hynix IR, quarterly results

DRAM/NAND price & inventory Commodity-memory cycle direction Filings/IR, memory price indexes

Foreign flows & FX Short-term pressure on Korean large caps Exchange investor flows, FX

Global chip trend Whether this is Korea-specific SOXX, NVDA, MU (Yahoo Finance)

Results & guidance The lag between expectation and reality Quarterly results, guidance

Takeaway

This decline does not mean the AI memory story is over. It suggests the market is separating a good long-term story from the expectations already embedded in price. The next stage depends less on slogans and more on HBM delivery, margins, inventory, foreign flows, and global semiconductor risk appetite.

Read more on this topic

→ AI Runs on Power: The Grid Bottleneck→ Why AI Money Rushed Back Into SemiconductorsBrowse the full 가격 archive →

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References

Market and filing data

• Yahoo Finance chart endpoint: 005930.KS, 000660.KS, SOXX, NVDA, MU, ^KS11

• Samsung Electronics IR: Source 1

• SK hynix IR: Source 2

• iShares Semiconductor ETF / SOXX: Source 3

Public news and industry signals

• Samsung Electronics, SK Hynix shares tumble over 9% as chip rout spreads from Wall Street – CNBC — CNBC (Thu, 02 Jul 2026 01:02:00 GMT)

• AI memory, chip stocks slump as sell-off continues amid global peers tumbling – Seeking Alpha — Seeking Alpha (Thu, 02 Jul 2026 17:33:00 GMT)

• Samsung, SK Hynix Plunge 7% as Chip Selloff Goes Global – The Tech Buzz — The Tech Buzz (Thu, 02 Jul 2026 04:11:00 GMT)

• Korean Stocks Tumble 8% as AI Jitters Trigger Chip Selloff – NAI500 — NAI500 (Thu, 02 Jul 2026 10:26:06 GMT)

• Japanese and South Korean semiconductor stocks tumble after US selloff – Crypto Briefing — Crypto Briefing (Thu, 02 Jul 2026 03:22:08 GMT)

• AI memory, chip stocks continue to see red but hyperscalers pull back; Wedbush sees sell-off an opportunity – MSN — MSN (Thu, 02 Jul 2026 09:53:28 GMT)

• SK Hynix to spend $64 billion on chip plants under broader AI-driven investment plan – The Economic Times — The Economic Times (Thu, 02 Jul 2026 04:41:46 GMT)

• Stock Market Today, June 23: Micron Falls as South Korea-Led Memory Selloff Raises Earnings Stakes – Yahoo Finance — Yahoo Finance (Tue, 23 Jun 2026 07:00:00 GMT)

다음에 같이 읽기

• AI 랠리 균열이란? 삼성전자·SK하이닉스가 같이 흔들린 이유

• 전세가 월세로 바뀌는 이유: 금리 인하에도 주거비가 안 내려가는 구조

• 생활비와 가격 지연

Notice: This article is for educational and informational purposes based on public sources. It is not personalized investment advice or a recommendation to buy or sell any asset. Readers are responsible for their own decisions.