What happened
South Korean memory chipmaker SK Hynix achieved a $1 trillion market capitalization on Wednesday, May 27, 2026, propelled by surging AI-driven demand for high-bandwidth memory (HBM) chips. This milestone follows Micron Technology's $1 trillion valuation on May 26, and Samsung Electronics also recently crossed the threshold. An exchange-traded fund tracking AI chipmakers has concurrently increased 87% in value over the past seven weeks, reflecting broad investor confidence in the sector.
Why it matters
The memory chip industry's valuation now reflects a structural shift, moving beyond historical volatility due to sustained AI hardware demand. This re-rates memory as a critical, high-growth component rather than a cyclical commodity. Investors must adjust their theses for memory chip stocks, recognising the AI infrastructure buildout as a durable demand driver, as evidenced by Micron's recent $1 trillion valuation.
