Chip Stocks' "Black Tuesday": A Technical Correction or a Bull Market Turning Point?

Original Title: "South Korea Ignites 'Black Tuesday': Has the Global Chip Stock Bull Run Suffered a 'Sudden Blow'? Is It Just a 'Technical Correction'?"

Original Source: Wall Street CN

Behind this round of chip stock crash is not an accident triggered by a sensational report from South Korea, but an inevitable liquidation driven by an extremely crowded AI sector and fragile leverage. Analysts at Goldman Sachs and others believe the AI narrative has not changed, with selling concentrated in crowded long positions, more resembling a 'technical correction.' However, with rising expectations for interest rate hikes and 65% of companies in a blackout period for share buybacks, multiple pressures are mounting, and the line between a correction and medium-term risk is blurred.

On Tuesday, June 23rd, global chip stocks were caught off guard by events in South Korea. One Wall Street strategist dubbed the sell-off a 'chip-wreck.'

The first to collapse was South Korea's stock market, this year's 'world's strongest market.' South Korea's KOSPI index plummeted 10% in a single day, triggering circuit breakers multiple times. SK Hynix and Samsung Electronics each fell over 10%.

Several seemingly minor news reports ignited the storm: South Korean media reported that Nvidia's Rubin was expected to see production cuts, and SK Hynix was slowing its expansion of high-bandwidth memory (HBM4) production, shifting towards cheaper general-purpose DRAM. Secondly, Yonhap News reported that lawmakers from multiple parties in South Korea were discussing a tax on unrealized gains from stocks, real estate, and other assets – meaning taxes would be due on paper profits even before selling.

This 'chip earthquake' then reverberated to the U.S. stock market.

Overnight, the Philadelphia Semiconductor Index (SOX) fell 7.9% in a single day, with all 30 constituent stocks declining without exception. Micron Technology dropped 13% – despite having surged over 300% year-to-date before Tuesday, making it the strongest component of the SOX. Together, Micron, Nvidia, and AMD contributed approximately 50% of the S&P 500's decline. The Nasdaq fell 3.3%, the Dow Jones Industrial Average slipped just 0.1%, and the S&P 500 dropped 1.4%.

Jonathan Krinsky, Chief Market Technical Analyst at BTIG LLC, stated: "Regardless of a potential short-term rebound, we still see medium-term downside risk in the Tech/AI complex." He believes the semiconductor sector still has 10% to 15% downside room and described Tuesday's market action as a 'Chip-Wreck.'

However, Peter Callahan, TMT sector specialist at Goldman Sachs Global Banking & Markets, wrote in a rapid commentary on June 24th: "Today's conversations with investors largely revolved around 'what are you seeing,' rather than signs of a broader narrative shift." This remark is key. It sets a boundary for the sell-off: The market picture is ugly, but at least for that day, there was no sign of capital completely abandoning the AI trade.

So the issue is not as simple as "a single report from South Korea collapsing the global AI bull market." It's more like a sector that had rallied significantly, become very crowded in terms of trading, and was carrying considerable leverage, collectively de-risking after a spark was lit. In the short term, it certainly has characteristics of a 'technical correction'; in the medium term, the fragile points of the AI trade have not disappeared.

It’s Contagion, Not an Accident

South Korea's meltdown may seem sudden, but the logic behind it isn't complex.

News of SK Hynix slowing HBM4 expansion tanked SK Hynix. Its weight in the South Korean stock market is similar to Apple's in the Nasdaq – too large to absorb shocks without dragging down the entire index. More critically, a large number of South Korean retail investors use leveraged ETFs to participate in AI/semiconductor trades. These products mechanically sell during market declines to maintain leverage ratios, creating forced selling.

The news itself was the fuse; the leverage structure was the explosive. Simultaneously, some market observers are asking, "Could leveraged South Korean retail investors be the terminator of the US tech bull market?"

While somewhat exaggerated, this question points to a genuine vulnerability: AI/semiconductor trading is highly concentrated, and the portfolio structures of global investors are strikingly similar. Selling at any node can propagate along this chain.

According to Goldman Sachs' post-market data, both long and short sides were selling that day. Long-only funds (LO) showed a selling skew of -18%, while hedge funds (HF) also sold consistently throughout the day, with short sales accounting for 60% of total volume (vs. ~50% recent average). The nominal exposure sold by both types of institutions exceeded $1 billion.

The stocks hit hardest on Wall Street were the 'crowded longs,' the 'biggest winners this year': Goldman Sachs' Memory Basket (GSTMTMEM) fell 10%, its AI Semiconductor Basket (GSCBSMHX) dropped 620 basis points, the AI Stock Basket (GSTMTAIP) fell 440 basis points, and the 12-Month Strong Performers Basket (GSXHUHMOM) slipped 420 basis points.

Technical Correction? Goldman Sachs: Narrative Hasn't Shifted

With such a significant decline, what does the market really think? Looking only at the percentage drops, Tuesday seemed like a repricing of the AI trade. However, judging from trading volume and capital flow data, the conclusion isn't so definitive.

Peter Callahan, Goldman Sachs' TMT desk expert, noted in his post-market report that the day's feeling could be described as 'orderly' – despite the sizable decline, Nasdaq volume was roughly in line with the 20-day average, and cash and volatility desks functioned normally.

More importantly, he described the nature of conversations with investors that day: "Today's dialogues with investors largely revolved around 'how are things on your end,' with no signs of a broader narrative logic shift or any incremental inquiries about 'new names' or 'laggards.'"

In other words, no one was rotating or searching for new investment directions. Everyone was just exchanging information.

Another Goldman Sachs strategist, Chris Hussey, provided specific data support: Among the 12 tech stocks that fell over 8% on Tuesday, all but one were still up by double digits for the year, with most having more than doubled. His assessment:

"Today's sell-off looks more like a 'skimming of froth' following an exuberant price rally, rather than a fundamental reassessment of the AI infrastructure trade. Investors aren't dumping the index en masse; they are re-evaluating: For stocks that have doubled in six months, what's the right price to pay?"

Jack Janasiewicz, portfolio manager at Natixis Advisors, offered a similar perspective:

"It looks more like a technical sell-off than anything else. Market breadth was reasonably good at the open, despite many big red numbers – a sign of a narrow sell-off." He also cautioned, "When you see such massive crowding in beta and momentum, it easily leads to an ugly deleveraging event."

The Other Side of a 'Technical Correction': Structural Concerns That Can't Be Ignored

The term 'technical correction' sounds reassuring, but it can explain everything while potentially disguising real risks. The Tuesday market action did have technical characteristics: selling concentrated among winners, volume didn't spiral out of control, and investor discussions didn't signal an immediate end to the AI narrative. Yet, there is no clear wall between a technical correction and structural risk – the former, if violent enough, can easily evolve into the latter.

Several background numbers are worth considering together.

First, the pace of the rally was too fast. The Nasdaq has risen over 30% since late March. In June alone, the Philadelphia Semiconductor Index saw single-day swings exceeding ±5% on 8 out of 16 trading days – meaning half of the trading days in June witnessed severe volatility in chip stocks. Even after Tuesday's drop, the SOX is still up about 5% for the month, outperforming the Nasdaq and S&P 500 by roughly 8 percentage points. A pullback from these levels has both the justification of a technical correction and the vulnerability of being 'too high.'

Second, positions are too crowded, and a key 'floor' is temporarily absent. Julian Emmanuel, Chief Equity and Quantitative Strategist at Evercore ISI, told Bloomberg TV: "People are looking for reasons to hedge, yet they want to keep their positions." This sentence accurately describes the market's conflicted sentiment. Meanwhile, 65% of publicly listed companies are currently in a buyback blackout period. Corporate buybacks have been a crucial 'flooring' force during past declines, but that card can't be played this time.

Third, the macroeconomic backdrop is shifting. Expectations for Fed rate hikes are rapidly increasing – Bank of America expects three more rate hikes this year, and the market-implied probability of a July hike has surged from near zero to about 50%. The valuation logic for high-growth tech stocks relies on low discount rates. If rates rise, the present value of future earnings naturally contracts, and stocks with valuations heavily dependent on future expectations are hit first.

Michael O'Rourke, Chief Market Strategist for institutional services at JonesTrading, wrote: "The hyperscale cloud computing companies are the new software stocks. This sector is dragging down the 'Magnificent Seven' and can't seem to find its own footing."

Torsten Slok, Chief Economist at Apollo, outlined three core questions facing the market: What happens if AI companies start cutting compute budgets due to insufficient ROI? What is the impact on stock and credit markets if the Fed hikes rates in September and December? These questions have no easy answers, but the market is shifting from 'willing to ignore these risks' to 'starting to take them seriously.'

A technical correction deserves serious attention not because of the drop itself, but because it occurs when valuation, positioning, interest rates, and sentiment are all at extreme levels.

Historically, South Korea's Crashes are Short-Lived – The Next Stress Test is Micron

Historical data shows that sharp declines in the South Korean stock market are often severe but brief. This is a 'silver lining' that bulls are keen to cite.

However, the current backdrop differs from past, purely domestic South Korean events: it touches the core nerves of the global AI trade – Is memory chip demand really as strong as expected? Has the frenzy of data center construction already overpromised future needs?

These questions will be partially answered after Micron's earnings report on Wednesday. Micron was the strongest component of the Philadelphia Semiconductor Index this year, up over 300% before Tuesday. Its earnings report will be a true stress test.

BTIG's Krinsky perhaps put it most directly: "Regardless of a short-term rebound or not, the medium-term downside risk for semiconductors remains."

Original Link