Global Chip Selloff Deepens Tuesday as Leveraged ETFs Amplify South Korea's Collapse Into U.S. Markets

Since South Korea's Kospi triggered a circuit breaker and fell nearly 10% overnight, the selling has migrated directly into U.S. trading on Tuesday, June 23, with semiconductor and AI-adjacent stocks leading losses across every major index.

As of this morning, the Nasdaq Composite is down 1.7%, the S&P 500 is off 1.1%, and the Dow is roughly flat, down about 66 points, according to CNBC. The VanEck Semiconductor ETF (SMH) has fallen 6%. The Direxion Daily Semiconductor Bull 3x ETF (SOXL) plunged nearly 20% in premarket.

What's Actually Driving This

Two separate but linked problems converged overnight.

First, a South Korean media report flagged by ZeroHedge at 8 p.m. Monday said SK Hynix is slowing expansion of AI memory chip production and shifting emphasis back toward commodity DRAM. That's a direct signal that one of the world's most important AI memory suppliers is pulling back on the trade that has fueled South Korea's 95% market rally this year.

Second, the structure of the leveraged ETF market made the selloff far worse than it would have been otherwise. Oppenheimer strategists put it plainly, according to CNBC: "The cat is fully out of the bag that this SMH run is being fueled at this point by far more than even the most exuberant AI bulls." The Csop SK Hynix Daily 2x Leverage ETF fell 23.8% in Seoul alone. Oppenheimer noted that ETF's relative weight on the Korean market is equivalent to "having a $750 billion-plus levered ETF in the U.S. on a single stock." This is a mechanical forced-selling loop that has little to do with underlying chip demand.

The U.S. Damage So Far

Micron Technology is down 11%. Sandisk dropped 12%. Seagate shed more than 8%. AMD and Qualcomm are off 5% and 8%, respectively. Intel is down 4%.

SpaceX fell below $150 this morning, the price at which the stock opened on its IPO debut roughly two weeks ago, putting it on pace for its fourth consecutive losing session, according to CNBC. The stock shed $600 million in market cap from its debut-day peak as the initial retail buying surge reversed, and the unwinding has continued.

Alphabet is down another 2% today, extending Monday's 5% drop tied to high-profile AI talent departures at the company, according to CNBC.

The one refuge: defensive names. Walmart is up 2%, Johnson & Johnson up nearly 3%. Microsoft is slightly positive. The rotation is textbook risk-off.

The Legitimate Bull Case

Not everyone is treating this as a crisis. Bank of America raised price targets across the chip sector Tuesday morning, according to CNBC's Club newsletter: Micron went to $1,500 from $950, Intel to $160 from $135, Applied Materials to $720 from $540, and Arm to $460 from $335. BofA maintained buy ratings on Micron and Intel.

Andrew Slimmon, senior portfolio manager at Morgan Stanley Investment Management, told CNBC Monday: "The AI beneficiaries are the sell-off, and I don't think they're expensive, but they're crowded. It's captured the zeitgeist of the momentum traders and when that happens, you're going to have sharp sell-offs like we're having. I'd argue it's healthy."

The strongest good-faith case for staying put holds that the AI infrastructure thesis hasn't changed, the selling is momentum-driven rather than fundamentals-driven, and forced liquidation of leveraged positions is finite. Ben Emons, CIO and founder of Fed Watch Advisors, framed it to CNBC as a question of "gravity" — whether today's session flushes out leveraged positions enough to create a buying opportunity, or whether the selling keeps feeding itself.

That thesis depends entirely on what Micron says Wednesday after the close.

The Micron Problem

Micron is the most important datapoint standing between the bull and bear scenarios. As Emons noted, "The Korean linkage is that Micron's performance could impact Samsung and SK Hynix even further, as the company provides insight into the industry's growth prospects."

If Micron confirms strong AI memory demand and raises guidance, the SK Hynix production-slowdown report looks like a company-specific strategic pivot rather than an industry-wide warning. If Micron's numbers disappoint or guidance softens, the selloff has fundamental backing. Leveraged ETF holders who bought the dip today could get hit again.

JPMorgan's read, according to ZeroHedge, is that today's selloff "may reflect anxiety into Micron's print" as much as the leveraged ETF structure. Both can be true simultaneously.

Susquehanna initiated SpaceX this morning with a hold rating and a $170 price target, according to CNBC, citing a "wide range of outcomes" on the company's relatively unproven markets. That $170 target sits 13% above current trading levels, but the analysts explicitly recommended waiting for a better entry point, a notable qualifier given the stock is still in freefall from its debut highs.

Cerebras, a recent IPO in the AI chip space, reports earnings after Tuesday's close. That print lands before Micron's Wednesday release and could either add to the pressure or provide a stabilizing read on AI infrastructure spending.