The Fastest ETF in History Just Hit $25 Billion in Four Months. It Owns Memory Chips

DRAM is far more concentrated than its ETF wrapper suggests. Samsung, SK hynix, and Micron account for roughly 73% of the portfolio, meaning investors pay a 0.65% expense ratio for what is largely a three-stock memory bet.

Micron has been the stronger pure-play on the memory boom. Since DRAM launched, MU has gained roughly 163% versus 108% for DRAM, as the ETF's Samsung and other holdings have diluted its exposure to the cycle's biggest winner.

Investors have clearer alternatives depending on their thesis. MU offers a higher-beta pure memory play, while SOXX provides broader semiconductor diversification; DRAM's strongest case is access to Samsung and SK hynix through a U.S.-listed ETF.

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The Roundhill Memory ETF ( CBOE:DRAM ) has become the retail trade of the year. Launched on April 2, 2026, DRAM was pitched as "the first-ever memory stock ETF", and buyers have piled in fast enough that the fund is being described as the fastest asset gatherer in ETF history, reportedly crossing $25 billion in assets in roughly four months. The appeal is obvious: memory pricing has ripped higher alongside AI infrastructure spend, and DRAM lets a US brokerage account own Samsung and SK hynix without wrestling with foreign listings. The fund is up 107.78% since inception. At face value, it seems like a fine idea; however, on closer inspection, it appears to be a fund most memory bulls do not actually need.

Strip the branding away and DRAM is a three-stock portfolio with a tail. Samsung Electronics sits at 24.99%, SK hynix at 24.22%, and Micron Technology at 23.83%. Those three names are 73% of the fund. The remaining sleeve, spread across Kioxia, Sandisk, Western Digital, Seagate, Nanya and Winbond, adds storage and Taiwanese memory exposure but does not change the concentration story. Geographically, 49.25% of the fund sits in South Korea, 37.65% in the United States, 6.31% in Taiwan, and 4.87% in Japan.

For that exposure, holders pay 0.65% annually. That is not egregious for a thematic ETF, but it is meaningful when the same trade can be built directly. It also introduces a wrinkle US taxable holders should understand: Samsung and SK hynix pay foreign dividends, and the fund's Korean exposure carries withholding tax and won complications that a domestic name does not.