A-share afternoon review | The three major indices soared and fell, glass fiber and innovative drug concepts were active, and the entire automobile industry boosted

The Zhitong Finance App learned that on September 17, the three major A-share indices opened lower. The decline narrowed rapidly after opening. The GEM index rose more than 1%, then the index rose and fell more than 1%, then collectively turned green in the intraday market and maintained weak fluctuations. At the end of the day, it fell slightly. The market showed a pattern of “indices rushing higher and falling, individual stocks falling more and less, and hot spots rotating rapidly”. By the midday close, the Shanghai index fell 0.36% to 3877.46 points, the Shenzhen Index fell 0.29% to 13415.41 points, and the GEM index fell 0.12% to 3307.63 points. More than 3,100 stocks fell and 2,260 stocks rose in the entire market. The Shanghai and Shenzhen markets traded 1244.5 billion yuan in half a day, an increase of 79.5 billion yuan over the previous trading day. In terms of capital, according to the Financial Services Association's monitoring data, the main capital flowed into sectors such as transportation equipment, optics, optoelectronics, and construction materials in early trading, with a net outflow of electronics, non-ferrous metals, semiconductors, etc., with a net outflow of over 6.4 billion yuan from the electronics sector.

Overview of the plate

On the upward side, innovative pharmaceuticals and AI pharmaceutical concepts showed active performance. The glass fiber, planting and forestry, and real estate service sectors registered the highest gains, while the automotive sector fluctuated and boosted; on the downside, the precious metals, oil and gas extraction and service sectors had the highest declines, and sectors such as components, small metals, and gas also declined markedly. Overall, the half-day trading in the Shanghai and Shenzhen markets increased markedly compared to the previous trading day, but the index rose and fell, and the rotation of hot spots accelerated. Capital was looking for low opportunities in the pharmaceutical, automotive, and planting industries. Resource sectors such as precious metals and industrial metals were clearly under pressure, and individual stocks in the entire market fell more or less.

Popular sections

1. Multiple stocks rose and stopped within the innovative drug concept

Within the innovative drug concept, many stocks rose and stopped, and individual stocks strengthened (the concept index rose 0.94% in half a day). Jinshi Asia Pharmaceutical rose or stopped 20CM, Baihua Pharmaceutical and Nanhua Biotech rose or stopped, offshore protein hit a 20CM rise or fall in the intraday market, Wanbang Pharmaceutical rose more than 10%, and Yiqiao Shenzhou and Baipsis followed suit.

Comment: On September 16, Novo Nordisk and Anthropic announced that they have reached a cooperation. The two sides will use Anthropic's artificial intelligence model and Claude Science platform to support drug discovery and development, and jointly explore the application of artificial intelligence in the entire drug development process. In addition, Jinshi Ya Pharmaceutical recently stated in an investor relations event that many products in the company's medical and health sector have made substantial progress. Among them, sales of the “Quick Express” amorofen hydrochloride liniment grew significantly year-on-year in the first half of 2026.

2. The glass fiber sector is getting stronger

The fiberglass sector strengthened. Sinoma Technology rose and stopped during the intraday period and closed up more than 7% in the afternoon. International Composites, Honghe Technology, Changhai Co., Ltd., and China Jushi followed suit.

Comment: According to the news, the price of electronic cloth continues to rise. According to the “Securities Daily” report, the latest data from Zhuochuang News in September shows that the prices of G75 and 7628 electronic cloth, the mainstream products in the domestic electronic yarn market have increased significantly recently, and most manufacturers have further increased the increase in some high-end models of electronic yarn; the financial news agency report shows that the factory price of the weather vane type 7628 thick cloth rose from about 4.6 yuan/meter in early 2026 to 11 yuan to 12 yuan/meter in September. Thin cloth 1080 and 2116 increased by more than 200% during the year.

3. The automotive sector fluctuated and boosted

The automotive sector fluctuated and boosted. Zotye, Ankai, Haima, and Shanzi Hi-Tech rose and stopped, Cyrus rose more than 3%, and Zhongtong Bus and JAC followed suit.

Comment: On the evening of September 14, GAC Group issued an announcement stating that the company and China First Automobile Co., Ltd. signed an “Intent Agreement” to purchase part of the shares held by FAW shares and raise supporting capital; according to preliminary estimates, this transaction is expected to constitute a major asset restructuring and related transaction. After the transaction is completed, FAW Co., Ltd. will become the second largest and strategically influential shareholder of the GAC Group. Furthermore, nine departments including the Ministry of Industry and Information Technology issued the “15th Five-Year Plan for the Development of the Intelligent Connected New Energy Vehicle Industry” on September 11, which proposes to promote market-based and rule-of-law mergers and restructuring of automobile enterprises, speed up cross-regional resource integration, and eliminate inefficient production capacity in an orderly manner.

4. Strong performance in the planting sector

The planting sector showed strong performance. The Dunhuang seed industry and the Jinjian rice industry rose and stopped, Wanxiang Denong rose more than 7%, and Shennong's seed industry followed suit.

Comment: According to the news, SDIC Securities's September 16 research report pointed out that the decline in US production drove global corn production to 1.291 billion tons month-on-month and year-end inventory to 272 million tons in 2026/27, continuing the global storage trend; Caixin Securities's September 11 research report showed that in 2026, the corn cultivation area decreased 7% year on year, compounded by high temperatures and droughts in some regions affecting yield. It is expected that new seeds will decrease and inventory pressure will ease marginal margins. Furthermore, the World Meteorological Organization issued a communiqué on September 3 stating that the El Niño incident will continue until February 2027, is close to 100% likely, and will reach a “super strong level” in the next few months. Extreme weather will impact the global food market. At the policy level, the Central Network Information Office, the Ministry of Agriculture and Rural Affairs, and the Ministry of Industry and Information Technology jointly issued the “Digital Village High Quality Development Action Plan (2026-2030)” on September 11, which proposes strengthening agricultural science and technology innovation and strengthening the construction of smart agricultural innovation carriers.