A Temasek Report Restarted Korea's Memory Trade — and SKHX Is Pricing Friday's Open

Seoul Gapped Twice on One Report

South Korean chipmakers have now gapped up two sessions in a row on the same story. On Wednesday, Asia Business Daily reported that Singapore's Temasek Holdings plans to invest directly in Samsung Electronics and SK hynix through its internal investment team, and SK hynix closed up 5.5% while Samsung added 6.7%, with the Kospi up 3.7%. Temasek has said AI-related holdings are roughly 6% of its portfolio and that it wants that as high as 15% by 2031. Memory is the cheapest seat in that trade, which is why one newspaper item moved a trillion-dollar company.

Thursday was the bigger day. SK hynix opened at 1,582,000 won, touched 1,634,000 intraday, and closed up 5.91% at 1,593,000 won. The Kospi finished at 6,813.34, up 3.56% for a fourth straight session and about 22% above its July 30 low — a technical bull market ten days after one of the sharpest drawdowns Korean tech has taken this cycle.

And it was not purely Temasek. Foreign investors bought a net 2.09 trillion won while retail sold 2.71 trillion, a flow pattern that says institutions were chasing something more durable than a single headline: an in-line July US CPI print and another round of AI infrastructure earnings that kept capex fears off the table.

The Perp Is Trading Friday's Open

Here is the part that matters if you are holding SKHX. This perp settles the KRX common converted to USD at the prevailing USD/KRW rate — not the Nasdaq ADR. At Thursday's 1,593,000 won close, with the won weakening 3.7 to 1,419.4, that conversion is roughly $1,122 per share. SKHX is at $1,196.

The ~6.6% gap is the ADR, almost to the decimal. SKHY closed Thursday in New York at $164.65, up 6.63%, stacked on the 9.01% it put on Wednesday night — the move that set up Seoul's second gap in the first place. So the perp is not detached from reality; it is pricing Friday's Seoul open. It can do that because it trades continuously while its reference does not. KRX is open roughly 00:00–06:30 UTC. For the other seventeen and a half hours the oracle is a stale print and the ADR is the only live vote on the same asset.

That is the structural edge and the structural cost of every HIP-3 equity perp. Hyperliquid funding is premium-to-oracle by construction, so a mark this far above the converted KRX price is precisely the input the mechanism is built to tax — longs are paying to carry that gap into the Seoul bell. The book supports it: $490.5 million of 24h volume on this market alone is genuine depth for a synthetic single-stock perp, not two accounts arguing with each other.

Where This Breaks

The catalyst is softer than the price action implies. Temasek pushed back on the report, saying it did not consult Korean officials on timing and that it first invested in SK hynix more than two years ago. That is a long way from a fresh, sized allocation. Two sessions of double-digit aggregate gains on one local-media item carrying a partial denial is the kind of move that round-trips.

The real binary is scheduled, and it is not Temasek. SK hynix told regulators on August 7 that it will finalize and announce additional shareholder-return measures within the third quarter, pulling the timeline forward from year-end after Citi and Morgan Stanley publicly pressed for buybacks. The 375-won quarterly dividend it declared alongside that filing is a rounding error against the cash this cycle is throwing off. The Q3 announcement is what re-rates the stock or disappoints it.

The fundamentals are not the argument here. SK hynix is running the largest memory buildout ever attempted — CNBC puts it at $720 billion to triple capacity by 2034 — with Nvidia having locked in HBM supply and next-generation co-development inside its $500 billion arrangement with SK Group, and the company crossed $1 trillion in market cap in May. The argument is price. SKHX at $1,196 is still short of the $1,243 it changed hands at on July 22. The 22% Kospi bounce has not yet round-tripped what memory gave back last month, which means this is a repair, not a breakout — until it clears late-July levels.