EWY Rebounds 5.30% as Nvidia–SK Hynix Memory Pact Reverses Korea's Circuit-Breaker Selloff

From an 8% Circuit Breaker to a Green Tape

South Korea's June 8 session was a study in whiplash. The KOSPI fell more than 8% in early trade, tripping a Level 1 circuit breaker as U.S. rate-hike fears and a global tech selloff hit an index that was already raw. This is the same basket that dropped 14.21% on June 5 when Broadcom's soft AI guidance cracked Korea's chip concentration — so the gap-down opened on already-frayed nerves, with Samsung and SK Hynix both down around 10% intraday.

Then it reversed. By press time the KOSPI's loss had narrowed to about 4.16%, and SK Hynix clawed its 10% drop back to roughly -1.59%, trading near 2.037 million won. EWY's HIP-3 perp, which trades around the clock, is pricing that recovery rather than the panic: +5.30% to $185.80 over 24 hours, clawing back a chunk of last week's Broadcom-driven drawdown.

Nvidia Just Reanchored the Whole Basket

The reversal had a name. Nvidia and SK Hynix announced a multi-year technology partnership on June 7 to codevelop next-generation memory for Nvidia's AI roadmap — the Vera Rubin AI supercomputers, Vera CPUs, RTX Spark PCs and Jetson Thor robotics platforms. Jensen Huang framed SK Hynix as Nvidia's largest memory partner, and the Bloomberg-confirmed pact lands squarely on the two stocks that anchor EWY.

It came with a supply-chain stamp: SK Hynix, Samsung Electronics and Micron have all passed HBM4 qualification and are moving to mass production, with HBM4 serving as the core memory for Vera Rubin and deliveries slated to start in Q3. SK Hynix and Samsung make up roughly 44% of EWY's basket, so a deal that re-rates Korean memory re-rates the ETF almost one-for-one. The same concentration that made the Broadcom miss so violent is exactly what made this bounce so fast.

The Bid Foreigners Keep Fading

The catch is who's on the other side. Foreign investors have been a persistent seller of Korea all year, and June 8 was no exception — overseas desks net-sold 1.24 trillion won, about $801 million, of KOSPI shares on the day. Cumulative 2026 net selling has now surpassed a record 103 trillion won, with Goldman pegging outflows near $62 billion through late May. Much of this is mechanical, not bearish: as Korea ripped higher, its weight in global and emerging-market benchmarks swelled, forcing active managers to trim to stay inside risk limits.

Underneath sits a leverage problem. Retail margin debt hit a record near 38 trillion won heading into June — the same fuel that turns an 8% gap-down into a circuit breaker and a partnership headline into a 5% snap-back. For an EWY perp at up to 20x, that two-sided fragility is the whole trade: the catalyst is real, but it's sitting on a structural sell wall and a stack of margin that can cut both ways.