Mainland China Stocks Plunge to 13-Month Low Amid Tech Sell-Off
The CSI 300 fell 2.2% on Monday, its lowest since August 2025, while the Star Market 50 dropped 4.1% as oil prices climbed above US$100 a barrel.

Mainland Markets Decline
Mainland China’s equity markets experienced a sharp downturn on Monday, with key indices reaching significant lows. The CSI 300 Index, a benchmark for Shanghai and Shenzhen-listed shares, fell by 2.2%. This decline pushed the index to a level not seen in 13 months, specifically since 21 August 2025.
Concurrently, the Star Market 50 index, which tracks technology and innovation-focused companies, tumbled 4.1%. This marked its most substantial single-day drop in five weeks, bringing it close to the low points observed during a technology rout in July.
Tech Sector Pressures Intensify
The primary driver behind the market’s retreat was an intensified sell-off in technology shares. Investors showed reduced risk appetite, influenced by two main factors: elevated global capital costs and a surge in crude oil prices. This combination created a challenging environment for growth-oriented technology firms, leading to widespread divestment in the sector.
The sentiment reflected broader concerns about profitability and future valuations under tightening financial conditions.
Global Economic Headwinds Persist
Global economic conditions contributed to the market’s unease. Crude oil prices surpassed US$100 per barrel on Monday, exacerbating inflation concerns. This price increase followed the United States’ rejection of a proposal from Iran regarding the restoration of shipping traffic through the Strait of Hormuz.
The ongoing diplomatic friction and its impact on energy markets kept US Treasury yields elevated, further increasing the cost of capital globally and weighing on investor sentiment.
In contrast to the mainland, Hong Kong’s Hang Seng Index registered a 0.5% gain on Monday, suggesting a divergence in market dynamics. For Asian businesses and investors, the sustained high oil prices pose a direct challenge, increasing import costs for most regional economies and potentially squeezing corporate margins.
Furthermore, the continued rise in global capital costs could constrain financing options for technology companies across Asia, impacting their expansion plans and innovation efforts.
This article is journalism, not investment advice; consult a licensed professional before making financial decisions. Market data is indicative, may be delayed, and should be verified with your broker or exchange before use.
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