Memory ETFs: DRAM vs HBMX — Not Which to Buy, but What Each One Holds

If you'd rather not manage ten tickers

Tracking the entire memory supply chain name by name is, frankly, a chore. Holding ten tickers and rebalancing isn't for everyone. So there are two ETFs people always ask about: Roundhill's memory ETF, DRAM, and a brand-new fund called HBMX.

Most people ask which one to pick. To me, that's the wrong question — because these two cover completely different parts of the same machine.

DRAM buys you the makers

The DRAM ETF holds only the companies that make memory — names like Micron, SK Hynix, and Samsung. There's not a single supplier among them.

This is a pure maker bet. It gives you direct exposure to whoever holds pricing power in the HBM supercycle, so it reacts most sharply when the cycle turns up. The flip side: memory is cyclical by nature, so concentrating on makers means you carry that volatility too.

HBMX blends makers with the supply chain

HBMX does a bit of both. It owns the makers but also reaches down into the supplier stack — the equipment, the packaging, the materials.

So HBMX captures part of the makers' upside while spreading risk toward the supply chain that collects a toll no matter which maker wins. In my view, that's a more balanced picture for an investor trying to dampen single-cycle volatility.

The two ETFs side by side

Item	DRAM	HBMX
Holds	Makers only (Micron, SK Hynix, Samsung, etc.)	Makers + supply chain (equipment, packaging, materials)
Exposure type	Pure maker bet	Blend of the whole stack
Cycle sensitivity	High (sharp both up and down)	Relatively diversified
Best for	Concentrated bet on the cycle turning up	Investors wanting diversified volatility

But something is still missing

The real choice is simple: DRAM buys you the makers; HBMX buys you a blend of the whole stack.

But honestly, the pure picks-and-shovels layer — the 10 core suppliers made up only of equipment, inspection, testers, bonders, and materials — isn't packaged completely by any ETF yet. HBMX reaches partway down that direction, but with makers mixed in, it isn't pure supply-chain exposure.

So here's my takeaway. If you want lower-maintenance exposure, DRAM or HBMX will do the job. But if you want to hold only the suppliers that get paid whoever wins, that's still a portfolio you have to build yourself. Neither is right or wrong — it comes down to which part of the cycle you want to bet on.

FAQ

Q: If I had to pick just one, DRAM or HBMX? A: If you want a direct, concentrated bet on the cycle turning up, DRAM's maker-only basket fits. If you want diversified exposure that includes the supply chain, HBMX fits. They aren't competitors; they cover different parts of the same machine.

Q: Is there a pure supply-chain ETF? A: Not currently — there's no pure picks-and-shovels ETF made only of equipment, inspection, testers, bonders, and materials. HBMX reaches partway down, but with makers mixed in, so pure supply-chain exposure means building it with individual names.