The Tema Memory ETF offers a way to play the memory boom without picking the winning stock. Memory chip revenue is forecast to rise from $200B in 2025 to over $700B in 2027, but HBM, DRAM and NAND don't always move together, so being right on the theme can still mean picking the wrong ticker. The fund holds 18 names led by SanDisk, Kioxia and SK hynix, including Korean and Japanese stocks hard to buy from US accounts. It is concentrated, new and charges 0.75%, so size it as a theme bet. x.com 

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 

For buying the memory dip, the DISK ETF looks better than the more popular DRAM ETF because its holdings are less concentrated. DRAM puts 75% in Samsung, Micron and SK hynix, while DISK holds about 50% in SK hynix, SanDisk and Kioxia, with extra Kioxia exposure that is a favored bet. DISK underweights Micron and Samsung, though, and 10-15% in each of the five big names would balance it better. Expense ratios are similar at 0.75% versus 0.65%. x.com 

Korean equities have a central role in the AI trade because Samsung and SK hynix supply most of the memory it needs. Despite the shakeout, the KOSPI leads the major markets shown at roughly +36% this year. The bullish lean faces a flow warning: Korean semiconductor ETF 20-day flows fell from nearly +$4B in June to about -$703M by October 18 as the index approaches rising support. x.com  x.com  x.com  x.com  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 

Sold-out HBM and cash returns make SK hynix look too cheap for a memory cycle that has not ended. Its HBM capacity is sold through 2027, 12-layer HBM4 is shipping, and next year's HBM prices are forecast to rise 121%. A completed ₩40T buyback adds shareholder returns; a special dividend funded by a Kioxia stake sale is possible. At roughly 4x earnings by one estimate, the shares could go higher if the AI memory cycle persists. x.com 

SK hynix's signed long-term cloud contracts give its AI-memory demand greater visibility and may support sustained pricing. Fourteen agreements cover over 50% of 2027-28 production capacity; HBM4 shipments are ramping, with the company expecting HBM4 to exceed HBM3E in volume and revenue by Q4 2026. AI-memory cash generation and Kioxia investment gains also underpin planned 2026 shareholder returns of about 100 trillion won, including dividends and buybacks. x.com  x.com 

A worsening memory shortage in 2027 could favor Micron, SanDisk and SK hynix as AI stocks. Samsung warns that the shortage will worsen then. x.com 

The Roundhill Memory ETF is a genuinely great way to get memory exposure, especially without access to foreign stocks. It concentrates on the three leaders, Micron at 24.6%, Samsung at 24.1% and SK Hynix at 23.1%, plus SanDisk, Kioxia, Western Digital, Nanya and Winbond. x.com 

The memory cycle looks set to last longer than expected because Micron is spending as if AI memory demand will run for years. Its capex was $27.4B in FY26 and about $25B in FY27's first half alone, with the second half expected higher, putting $50B+ in play; Micron wouldn't spend this aggressively if it saw the cycle ending next year. AI is consuming huge amounts of DRAM, NAND and HBM, a shortage that also benefits SK hynix, Samsung, SanDisk, Western Digital and Seagate. x.com  x.com  x.com  x.com  … Show more