AI and Chip Stocks Tumble as Rate Fears Spread Worldwide

A sharp pullback in artificial intelligence and chip-linked stocks moved from South Korea to Wall Street this week, dragging down Nvidia, Micron, Qualcomm and the newly public SpaceX in one of the roughest stretches for the AI trade since it took off.

A South Korean Circuit Breaker Triggers a Global Chip Retreat

The selloff's sharpest moment came in Seoul. South Korea's KOSPI index fell nearly 10% on Tuesday, June 23, tripping a circuit breaker that froze trading for 20 minutes. Samsung Electronics and SK Hynix, the two memory chipmakers that together account for roughly half the index's total value, each fell more than 12%. Because the pair had driven so much of the KOSPI's run-up this year, their reversal pulled the entire benchmark down with them.

The shock spread quickly across the region. Japan's Nikkei 225 dropped between roughly 1.9% and 3% on the same trading day, weighed down by AI-linked names including SoftBank Group. By the time U.S. markets opened, the unease in Asian chip stocks had already set the tone for Wall Street's session.

Nvidia Slips Below $5 Trillion as Memory Makers Take the Heaviest Hits

In the United States, the Nasdaq Composite fell 2.2% and the S&P 500 dropped 1.4% on June 23, with losses concentrated in the hardware supply chain that underpins AI computing. Nvidia fell about 4%, pushing its market capitalization back below the $5 trillion mark it had only recently reclaimed. Qualcomm slipped roughly 8%, and declines extended into Western Digital and SanDisk.

Micron Technology was hit hardest, plunging 13.2% in a volatile stretch for memory chipmakers generally. Micron's stock had been one of the best performers tied to the AI buildout, riding demand for high-bandwidth memory used in AI data centers; the reversal shows how quickly that same concentration of gains can unwind when sentiment shifts. Despite the rout, chip and AI-linked stocks remain net positive for the year, a sign that the move looks more like a correction within a crowded trade than a collapse of the broader AI story.

Rising Treasury Yields Sharpen Questions About AI's Capex Payoff

Two forces are doing most of the work behind the pullback. The first is interest rates: a strong U.S. jobs report and persistent inflation data pushed Treasury yields higher, reviving expectations that the Federal Reserve may hold rates steady for longer or even raise them. Higher yields are especially punishing for high-duration growth stocks, the category most AI and chip names fall into, because their valuations depend heavily on profits expected years into the future.

The second force is a harder look at the economics of the AI buildout itself. Investors are increasingly scrutinizing the massive capital expenditure cloud providers have committed to AI infrastructure, asking when — or whether — that spending will convert into durable profits. That question echoes an earlier tally of how much value the frontier AI industry had already shed by May, suggesting the profitability debate predates this week's selloff rather than being created by it.

Analysts describe the current move as a repricing rather than proof that an AI bubble has burst. The distinction matters: a repricing implies investors are recalibrating how much they'll pay for future AI profits, while a bubble bursting would imply the underlying demand story itself is breaking down. So far, the case for the latter is thinner than the case for the former, and it lines up with a separate account of markets rallying even as the broader economy showed strain — a pattern of stock prices running ahead of, or detached from, underlying fundamentals that has recurred through this AI cycle.

SpaceX's Post-IPO Swings Add a Second Volatility Story to the Selloff

Compounding the broader selloff, Elon Musk's SpaceX lost more than 20% of its value over three trading sessions, erasing over $600 billion in market capitalization. The decline followed a blockbuster public debut, and SpaceX's shares remain above their initial offering price even after the slide.

SpaceX's volatility is a distinct story from the chip and memory selloff, driven more by the mechanics of a freshly listed, thinly floated stock than by the same rate and capex pressures hitting Nvidia or Micron. But its inclusion in this week's losses underscores how broadly the market's reassessment of AI-adjacent valuations has extended — touching not just established chipmakers but the newest, highest-profile entrant to public markets as well.

What happens next likely hinges on whether upcoming earnings from major memory and chip suppliers reinforce or ease concerns about AI spending discipline. Until then, the selloff stands as a reminder that a trade built on near-uniform gains can unwind just as quickly when investors start asking harder questions about where the profits are.