Either memory ETF is a reasonable way to own memory, with a preference for Tema's DISK and its slightly higher NAND weighting through Kioxia and Sandisk. DISK, built with SemiAnalysis, is far more diversified, while DRAM holds over 75% in Micron, SK Hynix and Samsung. DISK is too light on Micron, and DRAM too light on Sandisk. Offhand, NAND prices grew faster than DRAM for the first time in Q2. x.com  x.com 

Micron is the better memory buy here because Korean stocks have traded poorly and SK hynix's US ADR carries a massive premium over its Korean listing. SK hynix remains the preferred company; HBM is favored over NAND, making Micron and SK hynix preferable to SanDisk. Memory stocks look cheap, with very attractive risk/reward at these levels, and are unlikely to stay cheap for long. x.com 

Sandisk's fast-growing data-center revenue strengthens its case among memory names with upside. Data-center revenue rose 61% quarter over quarter; revenue of $11.03B, adjusted EPS of $49.51 and adjusted gross margin of 85.1% all exceeded estimates. For upside among Micron, Sandisk and Kioxia, Micron ranks first, then Sandisk, then Kioxia, until further guidance. x.com  x.com 

Micron is the better company than SK hynix because its growth guidance and margins are stronger, though SK hynix is still a great company with further growth ahead. Micron's revenue grew 379% year over year versus SK hynix's 328%; its latest-quarter annualized GAAP P/E is about 7 versus 9 for SK hynix, or 6.5 for SK hynix after adjusting for currency and Kioxia charges. SK hynix's employee profit sharing weighs on its margins. x.com  x.com  x.com  x.com 

The newly launched DISK ETF offers direct exposure to the AI memory and HBM supercycle. Its top five holdings are Kioxia and SanDisk at 17% each, Samsung at 8%, SK Hynix at 7% and SK Square at 5%. x.com 

KMEM could have the long-term edge over DRAM as a memory fund because its heavier weighting in SK Hynix and Micron gives purer memory exposure than Samsung. Both charge the same expense ratio, and Fidelity users avoid a service fee with KMEM. The 41% SK Hynix weight may add volatility, and KMEM may pay a distribution. Existing DRAM holders can simply keep it and buy SK Hynix directly at its Friday IPO, while new investors with no memory exposure may prefer the more active KMEM. x.com 

Micron, Samsung Electronics and SK hynix look very cheap if their long-term agreements do not impose overly conservative price ceilings. Greater clarity on those pricing terms could send memory stocks up 30% in a single day. x.com 

More memory CapEx may yield proportionally fewer bits as HBM consumes more wafer capacity, supporting SK hynix and Samsung's pricing. Both reported double-digit quarterly DRAM and NAND price gains; Samsung targets 60-70% of mid- to long-term capacity under LTAs. SK hynix has the stronger execution record, but Samsung could benefit enormously from conventional memory without winning HBM4. If trends persist, normalized margins could rise, though memory remains cyclical. x.com 

SK hynix's sold-out memory capacity bodes well for Micron because it sells into the same shortage. SK hynix says its DRAM and HBM are effectively sold out through 2029; deals with 14 customers cover more than half its 2027-28 capacity, and HBM demand is twice what it can make. x.com 

Memory makers' long-term agreements cannot protect pricing when buyers regain leverage. The market underestimates downside even before a price collapse; SK hynix's agreements price within market-linked ranges, per @jukan05. The agreements will be ripped apart when the market turns to buyers, at the latest when China ramps. SK hynix, Samsung, Micron, SanDisk and Kioxia are exposed. x.com