What Is the DRAM ETF?
A fund that launched in April 2026 has already pulled in more money, faster, than any ETF in history. That fund is the DRAM ETF, and its story is centered around the chips that make AI run.
So what is it? The DRAM ETF is the Roundhill Memory ETF, the first U.S.-listed ETF offering targeted exposure to global memory companies at the center of AI infrastructure demand.1 Roundhill built it as a pure play on the chips that store and move data. Most funds spread your investments across a broad market, this one zeroes in on a single corner of the chip industry.
DRAM is an actively managed fund with quarterly rebalancing, and funds like it generally seek exposure to firms that earn most of their revenue from memory products. It currently holds 9 companies, so every name carries weight. For anyone investing in the AI space, the speed here is the story. Investors who watched the largest ETFs by AUM build up over decades do a double take. DRAM charges a 0.65% gross expense ratio and has just past $20 billion in total assets since launch.2 Its performance since the debut has been nothing short of remarkable. These are aggressive investments, poured in by the billion, and you’ll want to balance these holdings against your other investments.
Inside the Roundhill Memory ETF
The structure of the Roundhill Memory ETF is where it gets interesting. Under normal circumstances, the fund will invest primarily in equity securities of memory companies, or in swap agreements and forward contracts that provide exposure to those same firms. Filings say it puts at least 80% of net assets, plus borrowings for investment purposes, into securities of memory companies or instruments tied to them.3 The issuer counts a firm as a memory company when at least half its revenues or profits come from memory products.
Here’s the catch. Many big makers trade overseas, so buying their common stocks directly is hard for a U.S. brokerage. To get around that, the issuer uses derivative instruments, mainly total return swaps, which are contracts with a bank that track a stock’s return rather than holding the share. Each weight is calculated by combining the direct stock with any swap, and the underlying securities can be tricky to value abroad. That setup keeps the fund inside the rules that let it qualify as a regulated investment company for tax purposes.
Beyond stocks, the fund can hold preferred securities and a little debt securities, which sit between stocks and bonds. A government money market position, around 15% of assets, holds cash and short Treasuries as collateral behind the swaps. Its operating expenses run 0.65% a year, and those expenses come straight out of returns. The distribution arrives once annually, and that distribution is tiny because the 30-day SEC yield stays low. These are growth investments, not income payers, so the yield barely registers. The investment objectives center around memory. Active management means quarterly rebalancing, so the lineup is subject to change. You can pull the summary prospectus and other information from the fund’s website, an actively managed ETF at its core.
Why Memory Powers AI
Why has so much money rushed into one fund? The answer is found inside every AI data center. Large models chew through enormous amounts of data, and that data has to move fast from storage to the processor and back. The memory chips that shuttle it have become the choke point of the buildout. Roundhill’s pitch, paraphrased from its launch materials, is that investors had underrated this slice of AI infrastructure and that owning it is the opportunity. Model training is only part of the demand. Cloud platforms and the broader storage stack run on the same memory, which keeps AI hardware money flowing toward the category.
How High Bandwidth Memory Feeds AI Chips
High bandwidth memory, or HBM, is a stacked, ultra-fast chip that sits next to an AI processor and feeds it data fast enough to keep it working. Without enough HBM, even the strongest chip stalls. That’s the bottleneck. Demand from the AI sector has outrun what memory companies can produce, and their stocks have run hot. A limited number of manufacturers can build HBM at scale, because the technology takes years of research and heavy capital. Want a good look at the wider chip space? Our roundup of semiconductor ETFs covers it.
Where DRAM and NAND Fit
DRAM, short for dynamic random-access memory, is the working memory a computer uses moment to moment. NAND flash is storage, where data sits when idle. The DRAM ETF covers both, plus solid-state drives. Micron Technology is one of the few U.S. firms here, and investing in it bets that memory companies keep pricing power. The fund’s performance rides on demand, and the data on AI spending says it stays strong. That’s where your investments sit.
DRAM ETF Top Holdings
The DRAM ETF top holdings pack most of the fund into a few names. Roundhill reports each company’s weight by combining its directly held shares with its total return swap positions, and on that basis Micron Technology is the largest at roughly 29%. SK Hynix sits close behind near 25%, with Samsung Electronics around 18%. Add those up and three companies account for about 71% of the portfolio. Below the leaders the weights thin out fast: Kioxia near 8%, SanDisk close to 6%, Seagate and Western Digital around 4% apiece, then Nanya and Winbond rounding out the memory names.
Micron is the one to look at twice. It appears three times in the holdings, once as common stock and twice through swaps, which is how it ends up as the single biggest position. There’s also a sizable cash piece: roughly 15% of assets sits in a government money market fund that backs the swap exposure rather than tracking memory chips directly.
Step back from the tickers and the fund’s geographic split is close to even at the top. By region, memory exposure breaks down to roughly:
- United States: ~44%
- South Korea: ~43%
- Japan: ~8%
- Taiwan: ~5%
South Korea still carries real weight, all of it Samsung and SK Hynix, and that’s where the fund’s emerging markets and single-country risk live. The United States runs about even with it, mostly through Micron. Prefer a basket of fast-growing tech names? Our list of growth ETFs is a great place to start.
The Three Names That Drive the Fund
Three companies decide how the DRAM ETF performs day to day. SK Hynix and Samsung dominate the high bandwidth memory market, and Micron Technology is the main U.S. producer. When Nvidia confirmed its next chips would need supply from all three, those stocks jumped and the fund followed within hours. That tight link is the appeal and the risk. Below the leaders, storage makers like Seagate and Western Digital give the portfolio a foothold in solid-state and hard-disk drives. Seagate brings decades of storage know-how. The fund can hold preferred securities of these firms, and investors get the whole supply chain, every one of these securities, in one ticker.
Net Assets, Total Assets, and the Record Run
Here’s the record. DRAM crossed $1 billion in assets in ten trading days, which Roundhill called the most successful ETF launch of 2026 by assets gathered.4 It kept climbing. By mid-May 2026, the Roundhill Memory ETF had gathered nearly $10 billion in total assets in 43 days, the fastest any ETF in history had reached that mark. Bloomberg Intelligence analyst Eric Balchunas and TMX VettaFi both tracked the milestone, noting DRAM beat the prior record held by the iShares Bitcoin Trust.5 As of mid-June 2026, net assets sit around $20 billion, subject to daily market moves. As of June 18th, 2026 the fund’s price is up about 178.93% since launch. That performance number is recalculated daily, and the yield on its cash is an afterthought next to it; its performance since launch dwarfs the broad market. Assets under management this size, gathered this fast, are why people talk. Hold shares in a taxable brokerage account, and the share price moves in real time, so the price you pay changes throughout the day and the value of your investments can easily jump before lunch.
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The Risks of a Pure-Play Memory ETF
Now the part that should give you pause. Memory stocks have soared this year, and buying after a run that big runs against the old wisdom of buy low, sell high. So what happens if the cycle turns? A fund this concentrated can fall as fast as it climbed. Roundhill spells out the risks in its prospectus, and reading them before you buy is time well spent.
Concentration and Non-Diversified Exposure
DRAM is a non-diversified fund by design. With roughly 71% of the portfolio in three names, a rough quarter at SK Hynix or Micron can easily drag it down. The fund holds equity securities, swap agreements, and at times preferred securities of a small group of firms, so little cushions a drop. When a stock is hard to own abroad, the issuer leans on forward contracts and added swap agreements instead of equity securities. Because SK Hynix and Samsung trade in South Korea, you take on emerging markets risk, plus currency swings and lighter disclosure. Many investors follow a simpler plan, owning a handful of broad funds, and it exists for good reason. Our take on the rules of ETF investing and our guide to how many ETFs you need make the case for spreading your investments. This is one of the riskier investments in the chip space, and the risks pile up fast.
Semiconductor Cycles and Technology Risk
Memory is cyclical. Demand outpaces supply, then chips flood the market and the price collapses. The chip technology can shift, too. A rival design or a slowdown in AI spending would have an impact on every holding at once. These risks stack up fast. New funds carry a limited operating history, so there’s little track record, and no single particular security here is shielded from the cycle, which leaves the whole fund subject to the same swings. Foreign securities can be hard to value, and limited liquidity makes them harder to sell in a panic. Unlike bonds, these shares pay no fixed income. The filings list nine separate risks tied to a single slice of semiconductors. Past performance is no promise, and that performance history runs a mere ten weeks. Recent performance can reverse overnight and investors who hold it ride every swing. To protect your capital, size the position small. Before any investment decision, read the prospectus and filings, do your own research, and know when to sell before you buy.
DRAM vs Broader AI and Semiconductor ETFs
How does DRAM compare to broader options? A fund like the VanEck Semiconductor ETF (SMH) tracks a 25-stock index of chipmakers at a 0.35% expense ratio, per its SEC filing.6 That’s wider reach at lower fees, covering logic and memory makers alike. A core AI fund, such as Roundhill’s Generative AI & Technology ETF, spreads across software and hardware. DRAM does one job. The investment objectives differ, so the comparison is really about how concentrated you want to be. Broad funds that provide exposure to the whole semiconductor sector can smooth the ride, and many of those chipmakers trade on the Nasdaq. DRAM amplifies the swings. For yield, a broad fund pays more. Want a steadier anchor? See our pick for the best S&P 500 ETF, then add a slice on top. The data show narrow funds swing harder, so compare their performance, fees, and expenses before you move money, and check to see how DRAM fits your existing investments.
Who Should Consider DRAM?
So who is this for? Growth investors who already hold a diversified core and want a thematic tilt toward AI. Thematic ETF buyers who know they’re placing a concentrated bet. New to investing, or eyeing this for a big chunk of savings? Carefully consider it carries more of these risks than most beginners want. For a more sensible approach, keep the Roundhill Memory ETF as a small satellite, maybe 2% to 5% of your investments, and let a broad fund carry the load as your core ETF holding. Decide how much you can hold through a 30%+ drop without panic, this could very well happen. Investors who hold longer fare better than those who trade swings, and that should influence your investment decision more than any forecast. These thematic investments suit a small sleeve, not a foundation. Protect the rest of your long-term investments by keeping this exposure small, weigh the risks, and decide when you’ll sell and at what price before investing a cent.
How to Buy DRAM
Buying DRAM is very simple. Open or log into a brokerage account, then add funds, your cash, to that account. Search the DRAM ticker in your brokerage app, the way you’d look up any stock. A few holdings, like Micron, trade on the Nasdaq, but DRAM lists on the Cboe BZX exchange, so just type the ticker. Enter how many shares or how much money you want, check the market price, and place the order. Most brokerage services do this in under a minute. It’s really that simple. Once you own it, manage your position in your portfolio, and sell whenever you choose. Roundhill posts current holdings and the price on its website. Want the full walkthrough? Our guide on how to invest in ETFs covers account setup start to finish.
Should You Buy the DRAM ETF?
The DRAM ETF went on to rewrite the record books as the AI boom took off, and that deserves a second look. If you’re an investor after a concentrated dose of tech in a corner that’s notoriously hard to get a grip on, the Roundhill Memory ETF does the job in a single ticker. But for most investors, the smart money’s on having a broad, diversified core in the portfolio, and a speculative bet like this one tucked away in a small corner. There’s some genuine upside here, of course, but alongside that potential lies the risk of getting too concentrated, which for this ETF is 9 stocks, with 71% of assets firmly in the hands of just 3 of them. So before you put down a single dollar, study the holdings and size the position.
