The Roundhill Memory ETF, which focuses on high-bandwidth memory chip producers essential to AI infrastructure, raised nearly $10 billion（約1.6兆円） in assets in less than 45 days after launching on April 2—a record pace for ETF growth. The share price has nearly tripled since launch, prompting speculation that a stock split may occur later this year. Memory demand is growing structurally as AI models scale, but investors should be aware the fund is highly concentrated in four companies and exposed to the cyclical nature of the semiconductor industry.
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The Roundhill Memory ETF, which tracks companies making high-bandwidth memory chips used in AI accelerators, launched on April 2 and gathered nearly $10 billion（約1.6兆円） in net assets in under 45 days—a record pace for ETF asset growth. The share price rose from around $26 at launch to more than $81 at its peak, a roughly 78% gain in under two months.
Why it matters
Memory is a crucial but overlooked part of AI infrastructure. As AI models grow larger and inference workloads become more complex, the amount of memory required per chip is increasing—a structural trend rather than a short-term phenomenon. The fund gives retail investors exposure to major memory producers like SK Hynix and Samsung Electronics, which have been difficult to access directly in the U.S. market.
What to watch
The fund's rapid price rise may trigger a stock split later this year to make share prices more accessible to everyday investors, similar to what Roundhill has done with other thematic funds. However, the concentration risk is real: Micron Technology accounts for roughly 26% of the portfolio (including 10% in leveraged shares), SK Hynix and Samsung each around 24.5%, with nearly 80% of the fund in four companies.
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