SNDK Drops 13% as Seoul Floats an AI Windfall Tax

Seoul Lit the Fuse

The catalyst is policy noise out of Korea, not a company event. On May 12, presidential chief of staff Kim Yong-beom posted on Facebook calling for a 'national dividend' funded by a special tax on excess profits generated in the AI and semiconductor era, citing Norway's sovereign wealth model and proposing the money go to startup capital, basic income for farming and fishing communities, artist support, and old-age pensions. Markets did not wait for the nuance. The KOSPI sank as much as 5.1% intraday before paring losses to close down 2.3%, with Samsung Electronics off 2.28% and SK hynix 2.39% — the two names every desk read as the actual targets, even though Kim never named them. Kim later clarified he meant 'excess tax revenue' rather than a direct corporate clawback, but by then Bloomberg had already telegraphed the story to U.S. hours as a windfall tax on chipmakers, and the bid in the memory complex was gone.

Why It Bled Into a U.S. Stock

SanDisk is not Korean. It does not sell to a Korean state. The connection is the memory cartel: NAND and DRAM pricing power lives or dies with SK hynix and Samsung's discipline, and any framework that taxes their excess profits implies a future where those two are pressured to recapture share or cut prices to suppress the optics. That is the bear case the tape priced in. The Motley Fool spelled it out — investors are extrapolating Kim's remarks to a global precedent on AI-era profits, with SanDisk caught in a memory complex re-rate alongside Micron. TIKR framed the same session as a broad valuation-based memory selloff, with SNDK printing -9% intraday on no SNDK-specific news. When the strongest performer in the S&P 500 trades on a Seoul Facebook post, you are looking at a positioning unwind, not a fundamentals reset.

The Setup That Made It Worse

SNDK walked into this print with no margin for error. The stock was up more than 550% year-to-date heading into the May 11 record near $1,605, with Q3 FY26 revenue at $5.95B (+251% YoY) and datacenter revenue +645% YoY — numbers so strong that the bear thesis stopped being about the business and started being about price. Three of the top sell-side desks — RBC, Barclays, Wells Fargo — still had price targets below spot heading into this week, and Morningstar had been calling for profit-taking on the name for days. The put-call ratio was already at 1.42 with heavy downside open interest. All it took was one credible-sounding regulatory headline to give a crowded long book an excuse to ring the register.

What to Watch

The bounce setup depends on Seoul, not SanDisk. If Kim's 'excess tax revenue' clarification gets formalized as fiscal policy rather than a corporate levy — which is how the office is now framing it — the AI-tax overhang on memory names probably fades within a session or two. If President Lee Jae Myung lets the trial balloon keep flying without distancing himself, expect Samsung and SK hynix to keep leaking and SNDK to keep tracking them lower. On the SNDK chart specifically, the $1,605 May 11 high is now the line bulls have to take back, and the 20-analyst consensus PT still sits near $953 — roughly 30% below spot even after this drop. The valuation argument did not go away when the stock fell; it just got 13% less stretched.