Asian technology stocks faced a fresh wave of systemic selling on Tuesday, as weakness in the U.S. semiconductor sector overnight spilled over into Asia-Pacific markets, with concerns intensifying over increasingly fierce competition from Chinese memory chipmaker ChangXin Memory Technologies' technological breakthroughs, AI capital expenditure returns, and the financing environment.

South Korean and Japanese markets both suffered sharp declines, with the Kospi index plunging approximately 6% and the Nikkei 225 falling more than 2%. Investors accelerated their exit from AI and memory chip stocks that had performed strongly this year, ahead of a key earnings season and the release of U.S. inflation data.

In the South Korean market, SK hynix (SKHY.US) shares plummeted more than 8% intraday, while Samsung Electronics dropped 7.9%, both hitting their lowest intraday levels since August. Reports earlier indicated that ChangXin Memory Technologies had made progress on next-generation technology to increase memory density and was considering launching server memory products based on that structure before the end of the year. The news heightened market concerns about the competitive landscape, pricing power, and profit margins in the memory chip sector.

Pepperstone analyst Chris Weston noted that China continues to narrow the competitive gap with U.S. companies in AI models, humanoid robots, memory, and other technology supply chains. Its ability to develop more competitive products at lower costs is challenging existing assumptions about market share, pricing power, and margin sustainability.

Japanese technology stocks also came under pressure. SoftBank Group fell about 8%, leading declines in Japan's semiconductor and electronics sectors due to its large exposure to the global AI industry. Kioxia plunged more than 12%, while Tokyo Electron and Renesas Electronics dropped about 6%, and Advantest, Lasertec, and Disco fell about 5%. TSMC (TSM.US) declined nearly 2%, dragging Taiwan's stock market down more than 2%. Markets in Hong Kong, mainland China, Australia, and New Zealand also recorded significant losses.

AI Sentiment Remains Fragile

This round of selling followed overnight weakness on Wall Street. The Nasdaq Composite fell 0.44% on Monday, Micron Technology (MU.US) dropped nearly 4%, and SanDisk (SNDK.US) fell 6%. The global technology sector had only recently been recovering slowly from a summer selloff, which wiped out trillions of dollars in market value due to elevated valuations and uncertainty over the timing of returns on massive AI investments.

Vey-Sern Ling, a senior equity advisor at Union Bancaire Privee, said investor sentiment is tense, with many looking for excuses to take profits on AI-related stocks that have performed well this year, particularly memory names. Phillip Wool, chief market strategist at Rayliant Global Advisors, views ChangXin Memory Technologies' breakthrough as an important milestone for Chinese chipmakers, demonstrating their ability to overcome technical restrictions and potentially challenge established players sooner than expected. However, he noted that the market reaction is disproportionate to the direct competitive threat, as ChangXin Memory Technologies has yet to demonstrate large-scale production capacity and still lags behind Samsung and SK hynix in market share.

He emphasized that the current discussion does not even involve HBM, a field where South Korean chipmakers still hold undisputed dominance and are unlikely to face threats from players like ChangXin Memory Technologies for the foreseeable future. Therefore, he prefers to interpret this sharp selloff as a sign that AI sentiment is very fragile at the moment, and warned that volatility could persist as investors reassess chip demand and how long semiconductor manufacturers can maintain pricing power.

Meanwhile, the sustainability of the AI business model has once again become a focus. Broadcom (AVGO.US) CEO Hock Tan compared recent investor enthusiasm for AI to gambling, saying that "many investors don't know what they're investing in." They set extreme expectations, only to find themselves in what feels almost like a casino. He also warned that the industry has yet to find a sustainable model, mentioning that ChatGPT developer OpenAI has reported billions of dollars in losses. Tan said OpenAI is still losing money due to massive training expenses, and beyond the significant potential revenue growth from providing frontier generative AI models, there is not much more that can be said at this stage. OpenAI reported annualized revenue of $50 billion in September, which has been seen as a signal that its business model is viable, but long-term guarantees remain limited.

Pepperstone's Weston added that the financing needs behind AI buildout are becoming an increasingly important consideration for investors, especially as questions about capital intensity and future returns become more prominent. Intel (INTC.US) CEO also previously warned that even as demand for computing infrastructure continues to outpace supply, access to capital could become a major headwind for the AI boom.

Traders are watching earnings reports from major technology companies this month and next, as well as U.S. inflation data, to gauge the outlook for the AI industry and the path of interest rates, which typically move inversely to growth stocks.

In addition, the situation in the Middle East and the oil market are also drawing attention. Several powerful explosions occurred in Riyadh on Monday evening local time, following a series of recent Houthi attacks on the Saudi capital's airport that killed at least 18 people. A Houthi official warned the United States on Monday of a "painful response" if it intervenes in the Yemen war, after reports that Saudi Arabia had requested Washington's assistance in dealing with the group. Yemen's civil war reignited in July, with a Saudi-led military coalition supporting the government against the Iran-backed Houthis. The broader regional conflict has disrupted energy markets and plunged the Middle East into crisis. The Houthis quickly targeted Saudi oil facilities, tankers, and transportation hubs, including a series of deadly strikes on Riyadh's airport, dealing a blow to the world's largest oil exporter.

Nevertheless, the two major crude oil contracts still fell more than 1% on Tuesday, but Brent crude maintained its position above $100, posing ongoing upward pressure on global inflation.