China's major stock indices opened lower on June 17th. The three main benchmarks initially climbed and turned positive in the morning session before retreating, with the Shanghai Composite Index falling into negative territory before the midday break. A strong afternoon surge in the semiconductor sector triggered a rapid upward move across all three indices. A final push in the closing stages secured gains for the day.

In terms of market performance, printed circuit board (PCB) and substrate concept stocks saw a wave of limit-up gains. The semiconductor industry chain surged during the session, with multiple stocks hitting record highs. State-owned enterprises under the "China" prefix saw unusual upward movements in the afternoon. Declines were led by sectors including AI applications, major consumer goods, cultural media, coal, oil and gas, and automobiles.

At the close, the Shanghai Composite Index rose 0.4% to 4,108.08 points. The Shenzhen Component Index gained 1.31% to 15,880.95 points, and the ChiNext Index advanced 1.56% to 4,167.05 points.

Wind data shows that 1,720 stocks across the Shanghai, Shenzhen, and Beijing exchanges rose, while 3,732 fell, with 71 stocks remaining unchanged.

The combined turnover for the Shanghai and Shenzhen markets was 3,091.7 billion yuan, an increase of 27 billion yuan from the previous session's 3,064.7 billion yuan. Specifically, Shanghai's turnover was 1,403.1 billion yuan, up 33.5 billion from the previous day, while Shenzhen's turnover reached 1,688.6 billion yuan.

According to DZH VIP data, 159 stocks across the two main boards and the Beijing Exchange rose by 9% or more, while 6 stocks fell by 9% or more.

Semiconductors Regain Momentum; Building Materials Lead Gains

Among sectors, semiconductors returned to an upward trajectory. Stocks including ACM Research (Shanghai), Inc. (688082), Hua Feng Test & Control (688200), Puya Semiconductor (688766), Juhua Advanced Materials Co., Ltd. (688378), Aisen Semiconductor Corporation (688720), Memsensing Microsystems (688286), and Zhongju Semiconductor (688549) surged by the 10% daily limit or more, with over ten stocks in the sector showing similar strength.

Building materials led the market gains. Stocks such as Keshun Waterproof Technologies Co., Ltd. (300737), Changhai Composite Materials Co., Ltd. (300196), Kaisheng New Energy (600876), Kibing Group (601636), Shangfeng Cement (000672), and Sinoma Science & Technology Co., Ltd. (002080) rose by the limit or over 10%, with nearly ten stocks in the sector posting significant gains.

The rally in the electronics sector continued, with over 40 stocks, including Kexiang Electronic Technology Co., Ltd. (300903), Shannon Semiconductor (300475), Yibo Technology (301366), Guanghong Technology (300735), Mediocre Group (688079), and Truly International Holdings Limited (300088), hitting the 10% daily limit or higher.

Commercial retail led the declines. Global Top E-Commerce Co., Ltd. (002640) and Jiangsu Suhao Huihong Co., Ltd. (600981) fell over 5%. Stocks including Gongxiao Daji (000564), Central Emporium (600280), Quanxinhao (000007), You-A Department Store Co., Ltd. (002277), and Huitong Energy (600605) dropped more than 4%.

Coal stocks continued their decline. Yunnan Coal & Energy Co., Ltd. (600792) fell over 7%. Lanhua Sci-Tech Venture Co., Ltd. (600123), Dayou Energy (600403), and Liaoning Energy (600758) declined more than 5%. Baotailong New Materials Co., Ltd. (601011), Antai Group (600408), and Shanghai Datun Energy Resources Co., Ltd. (600508) were down over 4%.

Steel stocks were also among the laggards. Dazhong Mining (001203) dropped more than 7%. Shagang Group Co., Ltd. (002075) and Benxi Iron & Steel Co., Ltd. (000761) fell over 4%. Liuzhou Iron & Steel Co., Ltd. (601003), Inner Mongolia Baotou Steel Union Co., Ltd. (600010), and Shougang Group Co., Ltd. (000959) declined more than 2%.

Analysts Maintain Positive Long-Term Outlook Despite Short-Term Volatility

Dongguan Securities expressed the view that the market should balance offense and defense, seeking progress amidst change. It noted that the A-share market completed a three-phase pattern of rising, then falling, and finally recovering in the first half of 2026, with major broad-based indices ending in positive territory. However, the market currently faces multiple short-term disturbances: geopolitical tensions persist, uncertainty remains over whether profit-taking in previously leading sectors can digest current valuations, and monetary policy shifts in major overseas economies may pressure valuations in related sectors. The short-term outlook likely involves a period of high volatility and repeated fluctuations. The operating strategy should adhere to a mindset of balancing offense and defense. On the defensive side, a cautious approach is needed to manage short-term volatility, taking moderate profits from high-valuation popular sectors, and using high-dividend, stable-growth stocks as a buffer for portfolio positioning to protect gains. On the offensive side, confidence should be maintained in the long-term positive logic, supported by steady domestic economic progress, a solid capital market foundation, profit recovery, and incremental fund inflows. Amidst changing market styles and rotations, investors should seek opportunities within the transformation, focusing on thematic windows like new quality productive forces and the AI industry cycle, and exploring opportunities in undervalued sectors with improving profitability. Despite potential short-term fluctuations in the second half of the year, the medium-to-long-term upward trend remains intact, and a balanced approach is advisable to capture structural opportunities.

Central China Securities pointed out that recent market performance has been driven by multiple converging factors: the easing of tensions in the Strait of Hormuz and positive progress in US-Iran talks have significantly boosted global risk appetite, with Japanese and South Korean stock markets also rising sharply; the central bank conducted a 600 billion yuan outright reverse repurchase operation, sending a positive signal of liquidity injection; and the annual regular adjustments to the Shenzhen Component Index and ChiNext Index samples officially took effect on Monday. It is expected that the Shanghai Composite Index will likely maintain a consolidating pattern, with close attention paid to macroeconomic data, overseas liquidity changes, and policy developments.

Caixin Securities believes the market has likely stabilized for the time being, but the main theme going forward may still be a structural market characterized by an upward trend amidst repeated fluctuations. On one hand, as the three major indices approach previous highs, market divergence and pressure are gradually increasing. On the other hand, a new market leader capable of taking over from the hard technology theme has yet to emerge. Without healthy rotation between relevant sectors and the technology innovation direction, the market may still rely on concentrated strength in the technology sector to drive a breakthrough. Therefore, in the short term, risk appetite can be appropriately increased to participate in the market rebound. The technology innovation direction remains a key focus, while lightly positioning in undervalued sectors with sound logic can also be attempted.

Shenwan Hongyuan Group noted that a diversification of market leadership is occurring, which can be viewed from four aspects: First, domestic technology industry trends are undervalued, with the growth rate of small and medium-sized enterprises already in an upward cycle, creating conditions for a broadening technology rally. Second, 2026 is a year of supply-side consolidation, with the proportion of industries undergoing supply-side consolidation expected to increase from 8% in 2025 to 45% within the year. Over time, the number of sectors verifying cyclical improvements may continue to increase. Third, under the marginal pricing influence of sector-specific ETFs and single-theme active mutual funds, the potential volatility of technology-themed rallies has increased. While uptrends enjoy a positive feedback loop, caution is warranted against potential negative feedback loops during corrections. Fourth, since mid-May, the overall A-share market correction phase has featured significant divergence; subsequent rebound phases may naturally see a broadening of the advancing sectors. In terms of allocation, while the technology sector is in a short-term correction phase with relatively high implied volatility, medium-term prospects for AI trend opportunities remain favorable.