Key points
- The selloff was Fed fear: higher-for-longer rates hit the priciest AI names first.
- Korea's KOSPI fell about 10% and halted twice; the Nasdaq slid 2.21% and Micron (MU) dropped about 13%.
- An overnight rebound faded, leaving Micron's earnings as the test.
So much for the recovery. Asian markets clawed back a big chunk of Tuesday's crash overnight, and US stocks even opened higher this morning. But the bounce didn't hold. By open, the selling was back, the AI trade was leading the market lower again, and the mood going into Micron's earnings tonight is pure nerves. The fear that cracked this trade on Tuesday hasn't gone anywhere.
First, a reminder of how bad Tuesday was
This only makes sense against what it's bouncing from. Tuesday was a rout. Korea's KOSPI fell close to 10% and tripped its circuit breakers twice in one session. Over here, the S&P 500 dropped 1.44% to 7,365.46 and the Nasdaq slid 2.21% to 25,587.04, with the semiconductor index down nearly 8% on the day. Micron itself fell about 13%, Nvidia lost 3.2%, AMD fell 5.8%, and even Taiwan Semiconductor dropped 5.2%. Keep that hole in mind, because the "recovery" never really filled it.
The overnight rebound: shaky, and short-lived
Asia did the early lifting, and Korea led it. The KOSPI rose as much as 4% before settling up about 3.3% at 8,471. The two names everyone was watching split, though:
- Samsung Electronics jumped more than 9%, the single biggest reason the Korean index recovered. The spark was a report that the company is preparing a share buyback of nearly 90 trillion won. That was a report, not a confirmed plan, so treat it as a rumor with legs rather than a done deal.
- SK Hynix added a more modest 2.7%, and it was choppy getting there, swinging between gains and losses. The news pushing it was a planned US listing of American depositary receipts, reported at up to 45 trillion won, with the money earmarked for expanding capacity at home.
Even that wasn't clean. Japan's Nikkei 225 barely moved, finishing down about 0.2%, and the Korean rebound faded off its highs. Most desks called it position covering after an oversold day, not a real change of heart. They were right.
The bounce faded, and the selling came back
The US opened green and it didn't last. The early gains rolled over as the morning went on, and the same AI and chip names that got crushed on Tuesday were right back under pressure. This is the part you can see clearest in the Magnificent Seven, the megacap group that basically is the market right now. Most of them were red:
- Tesla: down about 5.7%, the worst of the group
- Nvidia: down about 4%, and as the most valuable company on the planet, that alone drags the whole index lower
- Alphabet: down roughly 0.8%
- Apple and Meta: hovering around flat
- Microsoft: up about 2%, one of the only green spots
- Amazon: up less than 1%
Micron told the same story in miniature. It was up about 4% in premarket, looking like it would ride the overnight rebound into its own earnings, and then it gave the entire bounce back at the open, sliding to an intraday low near $1,054. Names across the AI hardware complex that ran hot this year, from Intel to the optical and silicon-photonics group, leaked lower too. With Microsoft and Amazon the only real green among the megacaps, this was clearly a sell-off in the AI trade, not broad strength.
The why hasn't changed, and that's the problem. This is fear, and it's tied to the Fed. Traders are increasingly pricing in a more hawkish path, and higher-for-longer rates make the enormous, debt-funded AI buildout harder to justify at today's valuations. That math hits the priciest, most crowded AI names first, and until something convinces the market the spending pays off, every bounce is getting sold.
The one thing that can break the fear: Micron tonight
This is what the whole market is really waiting on. Micron (MU) reports fiscal Q3 2026 results after the close today, and it has become the single biggest tell for the AI memory trade. It's the cleanest US-listed read on the same high-bandwidth memory and DRAM demand that drives SK Hynix and Samsung, and it's the only American company making HBM at real scale.
Expectations are steep. Depending on whose estimates you use, Wall Street is looking for somewhere around $20 in earnings per share on roughly $34.7 billion to $35.8 billion in revenue. The number a lot of people are fixated on isn't even the headline EPS, though. It's gross margin guidance near 81% and whatever Micron says about pricing, because that's what tells you whether the HBM boom is a durable franchise or a cycle that has run ahead of itself.
And that's where the fear lives. This stock is up roughly 244% in 2026 and has crossed a $1 trillion market cap, so it's priced for everything to go right. The fact that it erased a 4% bounce in a single morning tells you how jumpy people are heading into the print. Micron has already said its 2026 HBM supply is sold out, which is a great demand signal, but it also means the bar is sky high. A strong report with confident guidance could finally break the fear and drag the whole memory group, SK Hynix and Samsung included, back up with it. Any hint of softer margins or peaking prices, and Tuesday's selloff could look like a warm-up.
One thing worth keeping in your back pocket: Micron has a habit of selling off right after earnings even when the numbers are good, as traders take profits on a name they already bid up. It happened after two of the last three reports. So if the stock dips tonight on a solid print, don't automatically read it as bad news. The guidance matters more than the first 30 minutes of trading.
Bottom line
The overnight rebound looked encouraging for a few hours, then it melted. Samsung's recovery in Asia was real, but here at home the AI trade is still selling off, most of the Magnificent Seven are red, and Micron gave back its bounce before lunch. The market is down because the fear hasn't broken, plain and simple. Micron tonight is the one thing with a real shot at changing that. If the numbers are as strong as the bulls expect, this could still turn out to be a scary dip that gets bought. If they aren't, the fear wins, and we'll be writing a much darker story tomorrow.
Sources
- Yahoo Finance, Global chip selloff and AI doubts (June 2026)
This is for information only and isn't investment advice. Figures come from market reporting on June 23 and 24, 2026 and from analyst estimates, which vary by source, so confirm the latest numbers before acting on anything.