A Week of Pain for Tech Stocks as AI Sell-Off Rattles Global Markets

A Brutal Week for Chips and AI Stocks

Volatility returned to stock markets this past week, and AI was once again the culprit. The tech-heavy Nasdaq dropped 2.21% and the S&P 500 fell 1.44% on Tuesday, June 24, as investors sold semiconductor chip stocks and other AI-related shares. But that was just one bad day in a string of them. By the time the dust settled on Friday, June 27, the damage across global markets was significant — and South Korea bore the worst of it.

The Nasdaq Composite posted its fifth consecutive losing session on Friday as investors rotated out of key technology stocks and into more defensive areas of the market. The tech-heavy index dropped 0.24% to close at 25,297.62, while the S&P 500 ticked down 0.05% to 7,354.02. For the week as a whole, the S&P 500 slid nearly 2%, while the Nasdaq fell 4.6%. The Dow outperformed, rising 0.6% over the same period.

South Korea's Market Takes a Historic Hit

Nerves about AI quickly spiraled into full-on panic trading in South Korea on Tuesday, where the Kospi index tumbled 10%, tripping a circuit breaker that led to a 20-minute cooling-off session. The index was dragged down by chipmaker SK Hynix and tech giant Samsung, with both companies ending the session with losses of more than 12%. These two companies are central pillars of the South Korean economy, and their collapse in a single session sent shockwaves well beyond Seoul.

The Kospi had been up more than 90% this year, so when the wind blew in an unexpected direction, it led traders — and, often more consequentially, trading algorithms — to head for the exits. In Europe, shares also fell sharply as the pan-European Stoxx 600 shed around 1%. The Stoxx 600 Technology index led regional losses, declining 3%. Chipmaker STMicroelectronics and Dutch semiconductor equipment maker ASMI were both down more than 7%.

What's Behind the Sell-Off

According to Mason Mendez, global real assets analyst at Wells Fargo Investment Institute, "AI and valuations for tech-related companies are returning to the spotlight, as equity markets shift their focus from the Middle East war towards the sustainability of tech-related spending amid rising global interest rates." In other words, the market's laser focus has shifted from geopolitical headlines back to a fundamental question: can the AI boom actually justify the sky-high valuations it has generated?

Chip stocks were also rattled by a report that OpenAI is considering delaying its IPO to next year because of SpaceX's poor post-debut performance and overall volatility in AI-related shares. The report raised concerns about the "sustainability of their infrastructure spending given the delay in funding from the capital markets," according to JPMorgan. Rick Gardner, chief investment officer at RGA Investments, offered some perspective, calling the tech downturn "a healthy pullback, since many tech stocks have become overstretched," and characterizing it as "a recalibration of expectations" ahead of earnings season in July.

Is This a Crisis or Just a Gut Check?

Despite the pressure building in global markets, Tom Hulick, CEO of Strategy Asset Managers, told CNBC that he wasn't concerned about a looming catastrophe. "I don't think we're anywhere near some type of catastrophic failure in the markets," he said. "There's too much liquidity out there, and the earnings momentum is very strong right now."

John Flood, head of Americas equities execution services at Goldman Sachs, agreed that the market could bounce back in the near future. "I still think that we're in buy dip mode," he said, noting that investors from retail to institutional are actively moving portfolios around. "I do think that the volatility will continue, but I do think the general trend for this market is higher, and dips still present solid buying opportunities." Whether that optimism holds will depend heavily on how the AI sector navigates a market that has grown increasingly impatient with promises and increasingly hungry for proof.