Key Bullet Points:
- Micron Technology (MU) plunged as much as 13% on Tuesday — erasing roughly $133 billion in market value in a single session — after reports emerged that SK Hynix is slowing AI memory chip production and shifting focus to lower-cost commodity DRAM, triggering a global semiconductor rout
- South Korea's Kospi index crashed 10%, triggering a circuit breaker that halted trading for 20 minutes, as SK Hynix and Samsung Electronics each plummeted more than 12% — the worst day for the world's best-performing stock market in years
- The carnage spread everywhere: the Nasdaq 100 dropped over 2%, the iShares Semiconductor ETF fell 6.2%, Intel sank 7.6%, AMD lost 6.2%, and even Nvidia declined 3% — all while Micron prepares to report earnings Wednesday after the close, with Wall Street expecting a staggering $33.5 billion in quarterly revenue
- Micron's stock has soared more than 900% from its 52-week low of $103 to Monday's all-time high of $1,211 — but Tuesday's crash raises a question investors can't ignore: did Wall Street's frenzied price target hikes (Stifel to $1,500, Susquehanna to $1,750) get ahead of reality?
- SpaceX fell another 3% after Monday's 16% collapse, briefly dipping below its $150 opening-day price before rebounding — while Carnival posted a record quarter beating earnings estimates but cut full-year guidance, and Apollo suspended $2.4 billion in investor withdrawals from its retail credit fund
The Day the Chip Trade Broke
For fifteen months, the semiconductor trade had one rule: buy the dip. Every pullback was a gift. Every earnings beat was proof that artificial intelligence would consume the world's supply of memory chips faster than anyone could build them.
On Tuesday, that rule stopped working.
Micron Technology — the third-best performer in the S&P 500 this year — cratered as much as 13%, falling from Monday's all-time closing high of $1,211.38 to a low of $1,054.98. At its worst point, the stock had shed roughly $133 billion in market capitalization in a single session. It closed around $1,078, down approximately 11% — its worst day since the AI rally began.
And here's the part that has every trader on Wall Street staring at their screens: Micron reports earnings tomorrow.
What Lit the Fuse
The selloff didn't start in New York. It started in Seoul.
Media reports emerged Tuesday morning that SK Hynix — the South Korean memory giant that had briefly overtaken Samsung Electronics as the country's most valuable company just one day earlier — is slowing the expansion of its AI memory chip production and shifting resources toward lower-cost commodity DRAM products.
The implications hit like a freight train. If the world's leading AI memory chip producer is pumping the brakes on expansion, what does that say about demand? The answer, or at least the market's interpretation, was immediate and violent.
SK Hynix and Samsung Electronics each plunged more than 12%. South Korea's Kospi index — the best-performing stock market in the world since early 2025 — crashed 10%, triggering a circuit breaker that halted all trading for 20 minutes. The Kosdaq, South Korea's small-cap index, dropped nearly 8%.
By the time Asian markets closed, the damage had rippled across the Pacific. Japan's Nikkei 225 fell 3.55%, ending an eight-session winning streak. Hong Kong's Hang Seng dropped 1.8%. And European chip stocks were already bleeding before New York even opened — STMicroelectronics and ASMI both fell more than 7%, while ASML dropped 5%.
The American Casualties
When the U.S. market opened, the selloff was waiting.
The Nasdaq 100 dropped more than 2%. The iShares Semiconductor ETF plunged 6.2%. The carnage was indiscriminate: Intel fell 7.6%, AMD lost 6.2%, and Nvidia — the $4.5 trillion king of AI chips — declined 3%. SanDisk, this year's top S&P 500 performer, dropped 8%.
But Micron was the epicenter. It opened at $1,144 and spent the day falling, hitting $1,054.98 before staging a modest late-day bounce. The stock that had risen more than 900% from its 52-week low now sat 13% below its peak — and tomorrow's earnings report would decide whether Tuesday was a buying opportunity or the beginning of something worse.
The Numbers That Matter Wednesday
Micron reports fiscal third-quarter results after the close on Wednesday, June 24. The numbers Wall Street expects are staggering.
The company guided for $33.5 billion in revenue — up from $23.86 billion in the prior quarter — and approximately $19.15 in non-GAAP earnings per share. Wall Street consensus has crept even higher, to roughly $19.72-$20.98 per share on revenue of $34.5-$35 billion.
Those figures represent an almost unimaginable trajectory. A year ago, Micron earned $1.91 per share. Now analysts expect roughly ten times that — in a single quarter.
The stock trades at about 57 times trailing earnings, a figure that would be alarming for any company. But on a forward basis, it trades at just 10-18 times expected earnings, because the market is pricing in an explosion of profits as AI memory chip prices roughly double. Stifel has a $1,500 price target. Susquehanna sits at $1,750. Wedbush, Deutsche Bank, and Rosenblatt are all above $1,200. Half a dozen firms more than doubled their targets in the past two weeks alone.
The bull case is simple: the AI infrastructure buildout requires unprecedented amounts of high-bandwidth memory, and Micron is one of only three companies on Earth that can supply it. The bear case is equally simple: when every analyst on Wall Street is tripping over each other to raise price targets, the stock has usually already priced in the good news.
Tuesday's SK Hynix report handed the bears their first real ammunition in months.
Beyond the Chip Rout
The broader market absorbed the tech selloff with surprising resilience outside of semiconductors. The Dow Jones Industrial Average edged higher, led by Caterpillar (+3.7%), Amgen (+2.1%), and JPMorgan (+1.9%). IBM gained 3% after JPMorgan upgraded the stock to a buy rating.
Carnival Cruise Line reported a record second quarter, with earnings of $0.41 per share beating estimates of $0.35. Revenue hit $6.66 billion, and net income surged more than 20% year-over-year to $569 million. Customer deposits reached an all-time high of $9 billion. But the stock's reaction was muted after the company cut full-year yield guidance by approximately 100 basis points, blaming prolonged Middle East geopolitical disruption that hit European demand.
In a separate development that raised eyebrows across the financial world, Apollo Global Management suspended investor withdrawals from its primary retail-oriented private credit fund after redemption requests surged to approximately $2.4 billion — roughly 17% of the fund — in the second quarter. The firm capped withdrawals at 5% of shares, a move that highlighted growing liquidity concerns in the rapidly expanding private credit market.
SpaceX fell another 3% on Tuesday after Monday's brutal 16% decline, briefly dipping below $150 — the price at which it first began trading on June 12. The stock rebounded modestly but has now shed hundreds of billions in market value over four consecutive sessions since its record-breaking IPO.
What It Means for Investors
Micron's earnings report on Wednesday will be the most important data point the market has seen in weeks. If the company beats expectations and reaffirms the AI memory demand story, Tuesday's selloff will likely be remembered as a shakeout — one more "buy the dip" moment in a rally that has defied skeptics at every turn. Several analysts, including Dan Ives at Wedbush, were already calling Tuesday a buying opportunity before the market even opened.
But if Micron's guidance disappoints — or if management echoes the SK Hynix reports about slowing AI chip expansion — Tuesday could mark the beginning of a broader reassessment of the AI trade that has powered global markets to record highs.
The stock closed Tuesday at roughly $1,078. Twelve months ago, it was trading at $103. The question every investor must now answer is whether that 900% move was the market getting it right — or getting ahead of itself.
Wednesday's report, expected at 4:30 p.m. Eastern, will provide the answer.
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