2026 A-Share Semiconductor Sector Overtakes Banking in Market Value; Cambricon Tops RMB 1 Trillion
In 2026, the semiconductor sector overtook banking to become the largest A-share sector by market value, with Cambricon's market capitalization exceeding RMB 1 trillion and Zhongji Innolight more than doubling in value during the year. Amid rising interest in artificial intelligence and domestic substitution, a first-time investor entered the market. After earning RMB 800 on an AI chip stock on the third day, the investor saw the stock fall 4% on the fifth day and suffered losses across the portfolio during a market correction. The investor's trading exhibited common behavioral patterns including chasing gains, relying on unverified information, overconfidence after a single profit, and neglecting position management and fundamental analysis.
Technology stocks performed strongly in 2026, with the semiconductor sector surpassing banking to become the largest A-share sector by market value. Cambricon's market capitalization exceeded RMB 1 trillion, and Zhongji Innolight more than doubled in value during the year. Market attention on artificial intelligence and domestic substitution continued to intensify. Against this backdrop, a novice investor with no prior stock market experience entered the market in 2026.
On the third day after opening an account, the investor earned RMB 800 on an AI chip stock. On the fifth day, the stock fell 4%. During a market correction, the investor's account showed losses across all positions, and the investor at one point decided to liquidate.
The investor subsequently began studying basic concepts such as the price-to-earnings ratio and learned that the payback period implied by the P/E ratios of some high-valuation technology stocks could exceed a century.
The investor's trading experience exhibited several common behavioral patterns, including chasing gains and selling on losses, relying on unverified information, overconfidence after a single profitable trade, a lack of position management concepts, and excessive focus on purchase prices while neglecting fundamental company analysis.