Weekly Signal Playbook · Jul 16, 2026:
Memory Crashed on Leverage, Not on AI
Two weeks ago we said memory had peaked and the money was rotating into the hyperscalers and Apple. This week memory did more than cool off. It fell into a bear market, and everyone is asking whether the AI trade just broke. Before you answer that, look at who was selling. Korean leveraged ETFs got cut in half and the regulator stepped in to dismantle them. The IPO crowd ran for the exit too. Meanwhile TSMC printed a beat and guided Q3 higher. Forced sellers meeting demand that hasn’t changed is what a good entry looks like, so we’re flipping memory from TRIM to ACCUMULATE.
1. What Changed This Week
1. Memory crashed 20%+, and the wreckage is leverage, not demand
Micron, Samsung, SK Hynix and the Roundhill Memory ETF are all down more than 20% from their recent closing highs. MU closed at $904 on the 15th, about 25% below the $1,213 record close from June 25. SK Hynix posted its biggest one-day fall in nearly two decades on Monday, down more than 15% as post-Nasdaq-debut profit taking hit. It bounced 13% Wednesday, then fell 11% again today while the KOSPI triggered its 37th sidecar halt of the year.
The interesting part is who was selling. The single-stock leveraged ETFs on Samsung and Hynix that listed in late May are down more than 60% from their June peak, and the biggest of them, a $3.4 billion fund, has lost about 45% since its debut. Then this morning South Korean authorities moved to rein in those leveraged funds, and that announcement alone knocked both stocks down again. When a regulator dismantling leverage is what moves the price, the price is telling you about positioning, not earnings. It didn’t help that Samsung and Hynix had grown to roughly half the KOSPI’s total weight, up from about a quarter at the end of last year. A trade that crowded doesn’t correct politely.
2. While the tape broke, the fundamentals firmed
TSMC reported Q2 today: $40.2 billion in revenue at the top of guidance, 67.7% gross margin above guidance, and a Q3 guide of $44.6 to $45.8 billion, another double-digit sequential step. Capex stays at the high end of the $52 to $56 billion range. ASML raised its 2026 guidance for the second time this year. Samsung’s preliminary quarter was a record, 171 trillion won of revenue at a 52% operating margin. And after the drop, Micron trades at about 6.3 times forward earnings.
One honest caveat, because it’s the real bear case. Morningstar estimates Samsung’s Q2 DRAM price hikes at 30% sequentially versus the 40% it expected, so the pricing slope is flattening. We’ll see the full detail when Samsung reports on July 30. But prices rising more slowly is not a downcycle, and HBM revenue is still tracking from about $35 billion last year to around $60 billion this year.
Our read: the demand curve is intact and the sellers were forced. That flips memory from TRIM to ACCUMULATE. In tranches, though. Hynix bouncing 13% one day and dropping 11% the next says the flush isn’t finished, and we’d rather be early and small than all-in and wrong.
