EWY Drops 14.21% as Broadcom's AI Guidance Miss Cracks Korea's Chip Concentration

The Broadcom Trigger

This started in California, not Seoul. Broadcom's June 3 earnings guided third-quarter AI revenue to roughly $16 billion against a $17.2 billion consensus — about a 7% miss — and set full-year AI guidance at $56 billion versus the $57.6 billion the street wanted. The absolute growth is still north of 200% year over year, but in a tape priced for acceleration, a deceleration is the story. AVGO fell more than 15% after hours and dragged the Philadelphia Semiconductor Index down 5.45%. By the time Asia opened, the read-through to anything memory- or AI-adjacent was already set.

Korea is where that read-through lands hardest. SK Hynix and Samsung are the HBM supply chain feeding the same AI buildout Broadcom just guided cautiously on, so a guidance wobble at the top of the stack flows directly into the names that anchor EWY.

Why Korea Took It Hardest

The KOSPI closed down 5.54% at 8,160.59, having traded over 6% lower intraday and dipping as low as 8,038 before trimming losses. The Korea Exchange tripped a circuit breaker after KOSPI 200 futures fell 5%, suspending program trading for five minutes. SK Hynix dropped 9.92% and Samsung Electronics fell 6.40% — and because those two sit at roughly 44% of EWY's portfolio, their moves are most of the index move.

The second leg is liquidity, not just sentiment. Foreigners net-sold 4.3 trillion won (~$3.12 billion) on the main board Friday and roughly 27 trillion won over six sessions, with much of that concentrated in SK Hynix. Part of that is positioning, not panic: global desks are raising cash ahead of the $2 trillion SpaceX IPO and the OpenAI and Anthropic listings expected behind it. When a crowded, foreign-owned, chip-heavy index meets a liquidity drain, the unwind is mechanical.

The Perp Ran Past the Cash Tape

EWY's 14.21% drop on the perp is roughly 2.5x the KOSPI's 5.54% cash-session loss, and the gap is the interesting part. EWY is dollar-denominated, so won weakness stacks on top of the equity move. The ETF's chip concentration amplifies rather than diversifies the underlying. And unlike the Seoul cash session, the perp trades continuously — it kept pricing through the weak US semiconductor tape that set this off, so it captured the full risk-off rather than a single market's open-to-close.

There's also a clean continuity here. In May, EWY cracked when a Samsung strike snapped the KOSPI from a record 8,046; the index since clawed back above 8,000 on the same chip names that are now leading it down. The concentration trade that made Korea a world-beater this cycle works in exactly one direction at a time, and right now that direction is down.