The trade that has powered global markets for much of 2026 reversed sharply on Wednesday, July 15, as investors dumped many of the year’s biggest artificial intelligence memory-chip winners.

SanDisk fell 12.4 percent, SK hynix’s U.S.-listed shares dropped 10.7 percent, Western Digital lost 7.7 percent, and Micron Technology declined 7.3 percent during Wednesday trading on the Nasdaq.

There were no major earnings disappointments, no guidance cuts and no significant company announcements. The selling reflected a broad shift in investor sentiment rather than deteriorating business fundamentals.

A dramatic reversal

The volatility began overnight.

South Korea’s Kospi index initially surged more than 6 percent, led by SK hynix and Samsung Electronics, before enthusiasm faded and selling spread into U.S. trading hours.

SK hynix’s American depositary receipts reversed sharply after soaring the previous session, while weakness quickly spread across the semiconductor sector.

Lam Research, Intel, Advanced Micro Devices, and the VanEck Semiconductor ETF all traded lower as investors rotated money into larger technology names including Amazon, Microsoft, Alphabet, and Apple.

A remarkable run before the selloff

The sharp declines followed extraordinary gains earlier this year.

Heading into this week:

• Micron had gained approximately 244 percent year to date.
• SanDisk had climbed roughly 640 percent.
• Western Digital had advanced more than 235 percent.
• Seagate Technology had risen approximately 216 percent.

Since late June, semiconductor companies have collectively surrendered roughly $1.5 trillion in market value as investors locked in profits after one of the strongest rallies in technology history.

What is driving the decline?

Several factors appear to be weighing on investor sentiment.

A South Korean brokerage lowered its earnings outlook for SK hynix, citing slower-than-expected shipments of next-generation HBM4 high-bandwidth memory chips.

Meanwhile, analysts continue monitoring increasing competition from Chinese memory manufacturers, creating concerns that future pricing power could weaken.

The market has also experienced increased volatility following the launch of several leveraged exchange-traded funds tied specifically to SK hynix shares. These products can amplify both gains and losses during periods of heavy trading.

Business fundamentals remain strong

Despite the selloff, company fundamentals remain robust.

Micron Technology recently reported quarterly revenue of approximately $41.5 billion, up more than 340 percent from a year earlier, while forecasting another record quarter driven by strong demand for AI memory products.

SanDisk likewise reported triple-digit revenue growth, improved profitability and eliminated its remaining debt.

Earlier this month, SK hynix completed one of the largest U.S. listings ever, raising approximately $26.5 billion during its Nasdaq debut.

Analysts at several major investment banks continue describing the recent decline as a healthy correction within a longer-term AI infrastructure growth cycle rather than evidence that demand has weakened.

Why businesses should pay attention

Memory chips power nearly every modern technology product.

They are essential components inside AI servers, cloud infrastructure, smartphones, personal computers and enterprise data centers.

Because manufacturers have increasingly prioritized AI-specific memory production, supplies of conventional memory chips remain tight, contributing to higher technology costs across multiple industries.

The current selloff reflects changing investor expectations—not collapsing demand.

Businesses purchasing servers, networking equipment and AI infrastructure continue facing elevated component prices despite recent weakness in semiconductor stocks.

JBizNews Desk | New York

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