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Micron, SK Hynix stocks sink as AI chip sell-off deepens

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Yahoo Finance

July 29, 2026
Micron, SK Hynix stocks sink as AI chip sell-off deepens

Global chip stocks are experiencing a sharp sell-off as investor anxiety grows over AI-related financing and market saturation. South Korea's Kospi index faced multiple circuit breaker halts as major memory makers Samsung and SK Hynix saw double-digit declines.

Market Turbulence: The AI-Driven Semiconductor Sell-off

The global financial landscape is currently grappling with a significant correction in the semiconductor sector, as investor sentiment toward artificial intelligence-related stocks sours. This downturn, characterized by sharp declines in both US and Asian markets, reflects mounting jitters regarding the sustainability of the AI boom that has dominated stock performance throughout the year.

The South Korean Market Impact

In South Korea, the impact has been particularly severe. The benchmark Kospi index experienced a dramatic 8% slide on Tuesday morning, triggering a mandatory 20-minute trading halt—a mechanism designed to curb panic selling. Upon the resumption of trading, the index plummeted further to trade 10% lower. This volatility is underscored by the fact that the Kospi has been halted eight times this year alone, highlighting the fragility of a market that had previously seen its value double since the start of the year.

Heavyweight Tech Slump

The sell-off has disproportionately affected memory chip giants. Samsung Electronics and SK Hynix, both pivotal players in the global supply chain, saw their shares sink by more than 10% to 14%. This decline mirrors broader losses in the US, where companies like Micron Technology, AMD, and Intel have also faced significant downward pressure. The PHLX Semiconductor Index, a key barometer for the industry, dropped over 3%, signaling a broad-based retreat from the sector.

Concerns Over 'Circular Financing'

A central driver of this unease is growing scrutiny over the financial mechanics behind AI growth. Reports suggesting that Nvidia is exploring a $250 billion funding backstop for OpenAI have sparked concerns regarding 'circular financing' deals. Investors are increasingly questioning whether the massive capital expenditure fueling the AI gold rush is grounded in sustainable revenue or if it is creating an artificial bubble that could burst if demand does not match the staggering investment levels.

Shifting Dynamics in Global Tech

The market sentiment is further complicated by the changing hierarchy among tech giants. Nvidia, the poster child of the AI revolution, recently lost its position as the world's most valuable listed company to Apple after a 5% decline on Monday. This shift serves as a symbolic turning point for investors who are beginning to rotate out of high-growth, high-risk AI stocks and toward more stable, diversified tech assets.

Future Trends and Market Outlook

Looking ahead, the semiconductor industry faces a period of intense recalibration. While AI remains a transformative technology, the current market response suggests that the 'AI trade' is undergoing a necessary, albeit painful, maturation process. Future trends will likely hinge on whether major chipmakers can deliver earnings that justify their high valuations and whether the underlying infrastructure demand for AI remains robust despite the current macroeconomic headwinds and investor skepticism.

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