DRAM Erases Its Micron Pop as a 4.1% PCE Print Sets Off Korea's Circuit Breaker

Korea's Circuit Breaker, Made in Washington

The trigger for this leg down sits in a US data point, not a Korean one. May headline PCE printed at 4.1% (core 3.4%) on June 25, reviving fears the Fed could resume hiking and sending risk assets lower worldwide. By the June 26 session that fear hit Seoul hardest: the KOSPI fell 8.18% to around 8,200 and tripped a market-wide circuit breaker, with Samsung Electronics down 9.21% and SK Hynix down 9.43%. It's the same memory-led tech rout that has gripped Korean equities for weeks. Even Samsung's planned 1,000 trillion won chip-investment reveal, due June 29, got treated as a sell-the-fact, not a floor.

Micron's Record Quarter Is Only a Quarter of the Story

Two days earlier Micron posted the best print in its history — revenue of $41.46B against roughly $35.8B consensus, adjusted EPS of $25.11, guidance near $50B for the current quarter, and 16 multi-year supply agreements. The stock rose about 15% and DRAM rebounded to roughly $77. The problem is structure. About 73% of the ETF sits in three names, and Samsung plus SK Hynix make up close to half the basket — both priced off a Kospi that just had one of its worst days of the year. Micron is only around a quarter of the fund. When Seoul sells, a single US blowout can't carry the whole basket, and that's exactly what played out here.

A Whipsaw, Not a Trend

DRAM has now run roughly -14% on June 23, +10% on June 25, and -9% on June 26 in three sessions — a leveraged-feeling proxy for Korean memory sentiment more than a clean read on AI memory demand. The June 24 launch of the 2X Long DRAM Daily Target ETF (RAM) only adds fuel to the swings. At $71.85 the fund is back below the Micron pop but still holding above its June 23 low near $69.22 — that low is the line that matters. For a product that gathered tens of billions since its April 2 debut, the concentration that drove the upside is now the same thing carving out the air pockets.