SKHX Tracks Seoul Shares' 5% Jump Into SK Hynix's Record Nasdaq Debut

The Debut Behind the Bid

SKHX is up 5.20% over the past 24 hours to $1,487, and the driver is one of the biggest events on the semiconductor calendar this year. SK Hynix priced its US listing at $149 per American depositary receipt, raising roughly $26.5 billion in a sale of 177.9 million ADRs that ran more than seven times oversubscribed, with total demand reported near $200 billion. That makes it the largest-ever US listing by a foreign company, edging past Alibaba's $25 billion 2014 IPO. Unusually, it came at a premium to the last Korean close rather than the customary IPO discount — SK Hynix billed it as the only premium-priced IPO of its kind in US market history. The ADSs are set to begin when-issued trading Friday under SKHYV, with regular-way trading under SKHY on Monday.

What the Perp Actually Tracks

This is the part that matters for anyone trading SKHX: it does not track the new US ADR. It tracks SK Hynix's Seoul-listed common shares (000660), converted from won to dollars at the prevailing USD/KRW rate. Those shares closed roughly 5.3% higher Thursday, and that session is what pushed the perp to $1,487. The listing hands the market a clean anchor — each ADR represents one-tenth of a Seoul share, so the $149 pricing implies a full-share value near $1,490. With the perp at $1,487, it is trading right on that line. The premium-then-discount swings SKHX printed earlier in the week around pricing have flushed out, and it now sits at fair value against the ADR mark. From here the perp is a proxy for Korean spot plus FX, not for whatever premium or discount the ADR itself opens with on the Nasdaq.

What to Watch

Two things set the near-term tape. First, the debut's reception: a book this hot — roughly $26.5 billion raised, with anchors like Baillie Gifford, Coatue and Situational Awareness Partners flagged for as much as $7 billion — can either confirm the bid or set up a sell-the-news fade once when-issued flow turns into regular-way trading Monday. Second, the underlying business: SK Hynix commands more than half the high-bandwidth memory market that feeds NVIDIA's AI accelerators, and the proceeds are earmarked for AI-critical capacity — the first-phase Yongin fab, the P&T7 advanced-packaging line in Cheongju, and EUV lithography tools. The risk under all of it is that memory is still cyclical, and the stock, up hard this week, remains below its late-June record near ₩2.99 million. For the perp specifically, Seoul spot and USD/KRW move the mark — not the ADR headline.