DRAM Falls 13.54% as Korea Floats AI Profit Tax

Why Korea Sold Off

The DRAM perp tracks the Roundhill Memory ETF, and the ETF is concentrated in two Korean names — SK Hynix and Samsung Electronics together account for roughly half the basket. That made it directly exposed to a single Facebook post.

On the evening of May 11 local time, South Korean presidential policy chief Kim Yong-beom floated taxing AI-era profits to fund a national dividend, writing that "the gains from the AI era are not the result of a few specific companies" and that "a portion of those gains should be structurally returned to all citizens." Foreign desks read that as a windfall-tax trial balloon aimed squarely at the chipmakers driving the country's tape.

Tuesday's Seoul session was brutal. The Kospi traded as low as 7,421 — a 5.12% drop from the 7,999 high it printed earlier that morning, with Samsung closing -2.28% and SK Hynix -2.39%. Foreign investors sold 5.6 trillion won (about $3.8 billion) before Seoul walked the remarks back, with the presidential office calling Kim's post "an individual opinion" and Kim himself clarifying that the funding source would be "excess tax revenue" rather than a new corporate levy.

The Concentration Problem

DRAM has always been a leveraged bet on three names. The top three holdings — SK Hynix near 24%, Samsung around 25%, and Micron near 24% — make up roughly 73% of the basket. That concentration is what produced the parabolic move the fund just gave back: the ETF was up 98% since its April 2 launch and crossed $6 billion in AUM faster than any prior thematic vehicle, with 30% of that move printed in the prior week alone.

Concentration cuts both ways. When the entire Korean tape opens 5% lower on a domestic policy soundbite, the ETF cannot dilute the exposure — and the HIP-3 perp, which trades while New York sleeps, marks the gap in real time instead of waiting for the cash open. That mechanical detail is the gap between a perp printing -13.54% over 22 hours and an ETF session that closed nearer -10% around $49.48.

The Strike Risk Still in Play

The clarifications matter for the policy story, not for the next leg. Samsung is also in day-two of government-mediated arbitration with its largest labor union, with more than 40,000 of 73,000 members already signed up for an 18-day strike starting May 21 if no deal lands. The union is demanding bonuses equal to 15% of operating profit and removal of the existing payout cap; JPMorgan estimates the cost of a prolonged stoppage at more than 40 trillion won of forgone operating profit.

For a basket that is roughly a quarter Samsung at weights well above index, that is a separate live tail risk sitting on top of the tax scare — and it hits HBM supply specifically, the part of the memory complex that has been driving the structural reprice Goldman now models at 250 to 280% DRAM contract price growth in 2026.