Roundhill Memory ETF attracts $200M in retail cash in record time amid AI trade surge
A fund built around memory chips has become the hottest thematic ETF launch in five years, pulling in over $200 million in cumulative retail net buying in just 27 trading days. The Roundhill Memory ETF, trading under the ticker DRAM, launched on April 2, 2025, and has returned roughly 88% since inception.
High-bandwidth memory, or HBM, is the component that feeds data to GPUs fast enough to keep them busy. DRAM’s investment thesis is built around this bottleneck. As AI server buildouts accelerate globally, demand for high-bandwidth memory and traditional DRAM chips is expected to surge in what some in the industry are calling a “memory super cycle.” The fund offers concentrated exposure to the companies manufacturing these components, rather than spreading bets across the broader semiconductor universe.
The top holdings tell the story clearly. SK Hynix commands roughly 27.4% of the fund’s weight, making it by far the largest position. Micron Technology, Samsung Electronics, and SanDisk round out the portfolio’s core.
Crossing $200 million in retail net buying within 27 trading days makes DRAM the fastest thematic ETF to hit that milestone since 2020. The fund has grown to approximately $6 billion in assets under management, putting it among the most successful ETF launches of all time.
DRAM’s concentration is both its strength and its risk. With SK Hynix alone representing more than a quarter of the portfolio, the fund’s performance is heavily tied to a single South Korean chipmaker. Memory semiconductors are notoriously cyclical, with a long history of boom-and-bust pricing cycles driven by supply gluts and demand shortfalls. The retail-heavy ownership base adds another variable, as funds dominated by retail flows can see sharper drawdowns during sentiment shifts because individual investors tend to exit positions faster and more uniformly than institutional holders.
