US AI and semiconductor stocks experienced a broad pre-market decline on June 5th.
Key players such as Intel Corp (INTC) and Qualcomm saw losses exceeding 3%.
Other notable decliners included Advanced Micro Devices (AMD), Taiwan Semiconductor Manufacturing (TSM), Lattice Semiconductor, and NXP Semiconductors, all down over 2%.
Broadcom and Nvidia also fell more than 1%.
Memory chip stocks were broadly lower, with Micron Technology (MU) dropping 4% and SanDisk declining over 2%.
As of the latest update, US index futures were mixed, with the Dow Jones Industrial Average futures barely in positive territory.
The Nasdaq 100 futures were down more than 1%, while S&P 500 futures fell over 0.5%.
Major Chinese Semiconductor Stocks Witness a Sharp Sell-Off
Influenced by an overnight slump in US semiconductor shares and a broad downturn across the Asia-Pacific region, China's A-share technology sector experienced a significant afternoon sell-off on high volume.
More than ten leading industry stocks with market capitalizations in the hundreds of billions of yuan collectively tumbled, causing a sudden chill in market sentiment.
By the market close, the STAR 50 Index plummeted over 4%, and the ChiNext Index fell more than 3%.
Semiconductor-centric tech stocks were at the epicenter of the decline.
Over ten prominent stocks, including companies like Shenghe Jingwei, Jiangbolong, Changchuan Technology, Biwin Storage, Dapu Micro, Demingli, ACM Research Shanghai, Shenghong Technology, Montage Technology, and Zhongji Innolight, all saw declines exceeding 5%.
Among them, the optical module leader Zhongji Innolight recorded a substantial 7.81% drop on heavy volume, marking its largest single-day decline since February 2nd of this year.
Its daily turnover reached 58.325 billion yuan, ranking first for the day and fourth in the history of A-share individual stock daily turnover.
Catalyst for the Global Tech Sell-Off
The immediate trigger for this global tech stock adjustment came from the latest earnings outlook provided by US AI chip giant Broadcom.
The company's revenue guidance for the next fiscal quarter was notably below widespread market expectations.
Investors quickly interpreted this signal as a warning that the growth rate of demand for AI infrastructure might be slowing.
The sell-off rapidly spread to Asia-Pacific markets.
By the close on the 5th, Japan's Nikkei 225 index fell 1.13%.
South Korea's KOSPI index saw a more pronounced drop of 5.54%, triggering a circuit breaker.
South Korea's two semiconductor giants, SK Hynix and Samsung Electronics, plunged nearly 10% and over 6% respectively, highlighting intensifying market concerns about a potential peak in the semiconductor cycle.
Analysis of the Market Contagion
An independent financial commentator provided a detailed breakdown of how this shock was transmitted and ultimately caused a sharp reaction in the A-share market.
He pointed out that the initial external trigger was a global profit-taking wave sparked by overseas leaders' "underwhelming" earnings, with Broadcom's AI business failing to meet inflated market expectations despite overall solid results.
Following significant gains in global tech stocks, the trading logic heavily relied on narratives of "exceeding expectations."
Any signal of a marginal slowdown triggered a classic "buy the rumor, sell the news" dynamic, leading to a pullback in the US tech sector and a subsequent sentiment spillover to A-shares.
Subsequently, severe volatility in the South Korean market exacerbated industry chain worries, creating an emotional resonance.
Given South Korea's role as a core global production hub for memory chips, the sharp declines in its heavily weighted stocks like Samsung and SK Hynix directly suppressed risk appetite in China's domestic memory and equipment sectors, further amplifying selling pressure.
Looking domestically, the analyst noted that the A-share tech sector itself had an inherent need for adjustment.
He explained that sectors like semiconductors and AI computing power had accumulated substantial profits this year, with high institutional concentration and crowded trades.
As market sentiment weakened, profit-taking emerged from high-position holdings.
The day's biggest decliners were largely the previously high-flying "star stocks," representing a normal adjustment after crowded trading.
Additional short-term factors accelerated the capital outflow.
The analyst added that it being a Friday prompted some funds to exit to avoid weekend uncertainty.
Simultaneously, recent regulatory scrutiny on concept speculation, such as inquiry letters and IPO progress, made active capital more cautious at high levels, collectively accelerating short-term liquidity contraction.
He summarized that this tech correction was a digestion of high valuations and profit-taking triggered by external disturbances, profit-taking by existing holders, and capital flight for safety.
Institutional Perspectives and Outlook
Notably, prior to the market turbulence, leading brokerages had issued forward-looking risk warnings.
A research report from CITIC Securities on June 2nd explicitly stated that for the second half of 2026, the biggest challenges were high global tech stock valuations and crowded positioning.
The report also warned that potential IPOs of companies like SpaceX, Anthropic, and OpenAI over the next six to twelve months could impact global tech market liquidity.
Considering that macro liquidity in the second half of this year might tighten marginally compared to the second half of 2025, market performance would rely more on the continuous delivery and verification of earnings.
However, regarding industry trends, CITIC Securities maintained a positive stance.
The report emphasized that at the current juncture, AI industry progress is in its early stages, and the opportunities presented by AI outweigh the challenges.
At the industry level, new directions and paradigms like video generation models, world models, and physical AI continue to emerge, with model iteration cycles expected to shorten further.
Model companies, represented by Anthropic, are seeing sustained growth in Annual Recurring Revenue and are gradually penetrating more high-value enterprise scenarios like finance, law, and healthcare.
CITIC Securities believes that as long as the industry's positive trend remains unchanged, valuation pullbacks caused by liquidity shocks present opportunities greater than the risks.
Huatai Securities also noted in its latest view that, considering the upcoming earnings vacuum period in June for both US and Chinese markets and the potential for US inflation to exceed expectations, there might be a short-term need for style rebalancing.
However, with the AI industry trend still intact and a foundation for incremental capital, AI is likely to remain a medium-term main theme.
For portfolio configuration, it suggests maintaining balance, adding to the tech theme on dips, focusing on sectors showing supply-demand improvement in Q1 reports like the power chain, and using dividend assets as portfolio stabilizers.
Regarding the future trajectory of the A-share tech sector, the independent commentator believes that in the short term, the sector will experience volatile consolidation and accelerated stock differentiation.
In the medium term, excellent tech companies will see a recovery driven by their mid-year earnings reports.
In the long run, benefiting from the essential demand for AI and independent innovation, high-quality targets will steadily advance upward, with technology remaining one of the market's core themes for the future.
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