EWY Cracks 6.60% as Samsung Strike Snaps KOSPI From a Fresh 8,046 Record

Eight Thousand, Then the Floor

South Korea's KOSPI tagged a fresh 8,046.78 intraday high Friday before reversing and closing 6.12% lower at 7,493.18, the worst session in roughly two months. The Korea Exchange tripped a circuit breaker on program trades as KOSPI 200 futures cleared the downside threshold. Samsung Electronics finished -8.61%, SK Hynix -7.66%, and the smaller-cap Kosdaq fell 2.61% in sympathy. Foreigners net-sold approximately 1.8 trillion won (~$1.21 billion), the heaviest single-session offshore exit since the citizen-dividend scare three days earlier.

Samsung's Strike Is Locked In

Government-mediated negotiations collapsed Wednesday May 13, and the union confirmed the 18-day walkout starts May 21. The union now counts more than 90,000 members, roughly 70% of Samsung's South Korean workforce, with 45,000-plus at the chip division. The demands: scrap the bonus cap, allocate 15% of operating profit to worker bonuses, and formalize the formula in employment contracts.

The price tag depends on who you ask. JPMorgan models the full 18 days at roughly 4 trillion won of lost revenue, about 1% of semiconductor division annual sales. Professor Song Heon-jae of the University of Seoul puts the daily damage closer to 1 trillion won, or $700 million per day, once you include the HBM lines that supply Nvidia. The union has said it is open to talking after June 7 but not before — meaning the market has to price the full walkout starting now.

The Concentration Trade Cuts Both Ways

Samsung and SK Hynix combine for a record 42.2% of the KOSPI index. The same concentration that drove the index from 7,000 to 8,000 in eight weeks is exactly what made Friday's tape so violent — when both chipmakers print -7% to -8% on the same session, nothing else in the index is large enough to absorb it. EWY is a direct leveraged proxy on this pair, and the dollar-denominated ETF prints track the SK Hynix and Samsung tape more tightly than the headline KOSPI move.

Wednesday's walkback rally on the citizen-dividend clarification — when EWY printed +7.97% to $188.20 — is now fully unwound. That is the tell. The policy scare wasn't the bull-case kill. The strike plus the concentration math is.

Trump-Xi and the Macro Overlay

Trump landed in Beijing Friday with a delegation that included Tesla's Elon Musk and Nvidia's Jensen Huang. President Xi warned that mishandling Taiwan independence could cause Washington and Beijing to face "clashes and even conflicts." The semiconductor export-control overhang from the summit hit chip names region-wide: Nikkei -2%, Hang Seng -1.6%, CSI300 -1.1%.

The macro layer doesn't help. U.S. PPI rose 6% year-on-year in April, pushing Fed futures to near-zero probability of a June rate cut. KOSPI's price-to-earnings ratio sits near 30 versus the S&P 500 at roughly 22 — a premium that worked while AI capex was driving the tape, but gets re-examined quickly when foreigners are net sellers and the dominant index name is staring at an 18-day walkout.