SK Hynix Rises 6% on $29B Buyback, SanDisk Gains 5%, Micron Climbs 3% as Memory Names Rebound

David Moadel

Wed, August 19, 2026 at 4:29 PM GMT+3 4 min read

Quick Read

SK Hynix's $29B treasury share cancellation, the largest in South Korean history, sent SKHY up 6% and dragged SNDK up 5% in sympathy.
DRAM concentrates 73% of assets in Samsung, SK Hynix, and Micron, amplifying both AI memory upcycle gains and any pricing rollover risk.
Micron's buyback stays capped by CHIPS Act terms until December, while Cathie Wood avoids memory stocks as rising costs push engineers toward less memory-intensive AI.
Act now: the analyst who called NVIDIA in 2010 just named his top 10 AI stocks — and Micron Technology didn't make the cut. Grab the names FREE today.

Shares of SK Hynix (NASDAQ:SKHY) are climbing 6% in Wednesday morning trading to $164.70 after the Korean memory giant approved the largest treasury share cancellation in the history of South Korean listed companies. The move follows a session in which SK Hynix stock closed down 9% at $155.62.

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The announcement is lifting sentiment across memory names. Micron Technology (NASDAQ:MU) stock is up 3% to $967.93, while SanDisk (NASDAQ:SNDK) shares are climbing 5% to $1,703. The Roundhill Memory ETF (CBOE:DRAM) is up 4% to $57.26 as the concentrated basket rides the same tape.

The rebound arrives amid a broader debate about how long the AI-driven memory upcycle can persist. Wednesday's bounce answers Tuesday's selloff, but the tension between record capital returns and record fab spending sits at the center of the story.

Record Treasury Share Cancellation Fuels the Move

SK Hynix approved a plan to repurchase and cancel 40 trillion won, about $28.6 billion, of treasury shares. The board resolution covers roughly 24.07 million shares, 3.3% of total shares outstanding, based on the closing price of 1,662,000 won the day before the vote. The repurchase period runs from August 20 through November 19, and all acquired shares will be canceled upon completion.

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Management also revised the 2025 to 2027 shareholder return commitment upward, moving from a ceiling of 50% of cumulative free cash flow to a floor above that level, delivered through repurchases, cancellations, and cash dividends. Fixed and special dividends are under consideration, with details due alongside third-quarter earnings likely in late October. The company said its intrinsic value "is not fully reflected in its current stock price."

The scale is possible thanks to a fortress balance sheet. Net cash sat at approximately 69 trillion won, about $49.36 billion, at the end of the second quarter. Last week the company approved 54 trillion won of investment to build two new fabrication plants in South Korea, one for DRAM in Yongin and one for NAND flash in Cheongju.

Peer Memory Names Follow Higher

Micron Technology stock is riding the group tailwind after a blowout June quarter. The company reported fiscal Q3 2026 revenue of $41.46 billion, up 345.7% year over year (YoY), with non-GAAP EPS of $25.11 beating consensus by 23.8%. Micron has been more restrained on buybacks because of a buyback limit tied to its CHIPS Act grants, a restriction that lifts in December.

SanDisk shares are extending an already sharp run, with the company reporting fiscal Q4 2026 revenue of $8.965 billion on August 5 and full year FY2026 datacenter revenue up 437% YoY. Earlier this month SanDisk added $14 billion to its share repurchase authorization, taking the total exercisable limit to $15.5 billion, and that capital-return signal is a big reason SanDisk stock has run 585% year to date (YTD).

The Roundhill Memory ETF and Concentration Risk

The Roundhill Memory ETF tracks the broader rebound across memory manufacturers. Top holdings include Samsung Electronics at 25.0%, SK Hynix at 24.2%, and Micron Technology at 23.8%, with the top three collectively representing 73.0% of net assets. SanDisk sits at 4.7%.

This is a narrow fund. It rises and falls with the memory cycle rather than the broader chip sector, which means the ETF magnifies both the upside from AI-driven demand and the downside from any pricing rollover. Investors weighing the ETF should size positions with that concentration in mind.

What to Watch

The tension for the sector is real. SK Hynix is committing enormous capital to buybacks at the same time it is spending enormous capital on new fabs, and investor Cathie Wood has said she is steering clear of memory stocks, arguing memory is becoming increasingly expensive and will push engineers toward AI systems that need less of it.

Traders can watch for whether Wednesday's gains hold into the close and how the ADRs settle against the Nasdaq debut. The company listed ADRs on July 10, and the stock remains 12% below its Nasdaq debut opening price. Additional detail on dividend policy is expected with third-quarter earnings in late October, and Micron's post-December capital-return posture will be the next major test of whether the memory group's buyback wave has legs.