SKHX Keeps Unwinding Its ADR Pop as Samsung Takes the HBM4 Lead

From ADR Pop to Profit-Taking

SKHX has been one of the loudest tapes on the venue this week, and the move is mostly a round trip. On June 24, SK Hynix filed to raise up to roughly $29 billion through a Nasdaq ADR listing slated for July 10 — the largest ADR offering on record, eclipsing Alibaba's $21.8 billion 2014 debut. The Seoul shares surged double digits on June 25, helped by strong Micron earnings, and SKHX popped with them.

What the tape is doing now is bleeding that pop back out. The dilution math is real but modest: up to 17.79 million new shares trim existing holders by about 2.44% — not enough on its own to justify a near-10% reversal. This is positioning unwinding a too-fast move, not the market re-rating the raise itself.

The HBM4 Lead Just Changed Hands

The overhang that actually matters is competitive. On June 23, TrendForce reported that Samsung's HBM4 revenue topped $1 billion — the first product in the industry to hit that mark, just four months after February mass production — while SK Hynix pushed its own HBM4 volume ramp into Q3 and cut its full-year HBM4 shipment outlook from 4.5B Gb to 4B Gb.

The choice is deliberate. SK Hynix is leaning back toward commodity DRAM, where DDR5 operating margins are running near 90%, rather than racing into the next HBM generation. That is a defensible cash decision, but it hands Samsung the HBM4 storyline at exactly the moment SK Hynix had dethroned Samsung as Korea's most valuable company. For a stock priced on AI-memory leadership, ceding the leading-edge narrative — even temporarily, even profitably — is the kind of thing that converts a pullback into a trend.

Macro Did the Rest

None of this happened in a vacuum. The KOSPI slid more than 4% from a record high on June 23 as a global tech sell-off hit Samsung, SK Hynix and Kioxia together, and the selling extended into the June 26 session. The macro trigger was a hot US inflation print — May PCE came in at 4.1% — reviving Fed rate-hike fears and pulling money out of the most crowded AI trades first. SK Hynix had run vertical into its record high, so a market hunting for a reason to book profits found several at once.

Reading the Synthetic

One structural note for anyone trading SKHX rather than the Seoul listing: the perp is repricing harder than the cash shares. The underlying 000660.KS fell a few percent in the June 26 session, while the synthetic is down closer to 10% over 14 hours. Part of that gap is the oracle's KRW-to-USD conversion, which layers won moves on top of the equity move; part is that this perp keeps trading after Seoul closes, so it absorbs sentiment the cash tape cannot price until it reopens.

The calendar to watch is the July 10 listing and any HBM4 ramp commentary from management. Until one of those resets the story, the path of least resistance is the one the tape just took.