2026-04-03-Seeking Enduring Bulls Amidst a Market-Wide Correction: AI Optical Communications Drives Structural Euphoria and High-Stakes Speculation Under Trillion-Yuan Turnover

📊 Market Snapshot

• Shanghai Composite Index: 3880.10 (-1.00%)

• Total Market Turnover: CNY 1,656.467 billion

• Advance-Decline Ratio: 716 / 4746

• Limit-up / Limit-down / Failed Limit-up Counts: 36 / 24 / 12

🔍 Top Twenty Stocks by Turnover

🏆 Sector Analysis

Top Five Concept Sectors (Sorted by Percentage Change)

Top Advancing Stocks by Sector

CPO Concept

Optical Communication Modules

Lidar

F5G Concept

Previous Day 2+ Board Performance

💥 Limit-Up Stocks

💔 Failed Limit-Up Stocks

🚀 Dragon-Tiger List

⭐ Key Stock Watchlist

High-Turnover Anomaly Pool

Hot Sector Limit-Up Pool

🤖 AI In-Depth Analysis and Insights

1. Market Sentiment Diagnosis

Today, the A-share market exhibited a significant market-wide correction, with the Shanghai Composite Index falling by 1.00%. Total market turnover reached a high of CNY 1,656.467 billion, indicating active trading but substantial capital divergence. The advance-decline ratio was 716/4746, with declining stocks far outnumbering advancing ones, clearly signaling a broad market sell-off and extremely poor overall profit-making opportunities.

There were 36 limit-up stocks, 24 limit-down stocks, and 12 failed limit-up stocks. While the number of limit-ups was acceptable, the number of limit-downs was relatively high, and the 25% failed limit-up rate was within the normal range. This suggests that local capital is still actively engaging in speculation, but overall market risk appetite has declined, with panic sentiment spreading in some individual stocks. The current market phase can be defined as “High-Volume Market-Wide Sell-off Marked by High-Level Divergence and Re-aggregation of Local Hotspots.”

Profit-making opportunities were primarily concentrated in a few hot technology sectors and some rebounding individual stocks, while the vast majority of stocks faced downward pressure, indicating widespread loss-making sentiment.

2. Core Theme and Capital Flows

Judging from the [Top Twenty Stocks by Turnover] and [Sector Performance Rankings], capital flows are highly concentrated in “AI Optical Communications” and related technology hardware sectors. Among the top twenty stocks by turnover, CPO concept stocks such as InfiNet Technologies, Eoptolink, and Tianfu Communications occupied the top three spots. Core optical communication stocks like Hengtong Optic-Electric, Accelink, and YOFC also ranked high and performed strongly. This clearly indicates the market’s current core theme.

In the [Sector Analysis], CPO Concept, Optical Communication Modules, Lidar, and F5G Concept dominated the top four spots in percentage gains, further confirming capital’s recognition and pursuit of AI infrastructure construction (especially optical modules and optical communications).

Regarding market style, today was a typical “thematic speculation” driven market, with high concentration within a strong theme. Traditional blue-chip stocks like CATL and Sungrow Power Supply saw declines, indicating that capital continues to flow out of old sectors and into new AI technology sectors, a pattern distinct from “blue-chip-led market support.”

3. Consecutive Limit-Up Ladder and Speculative Space

Lead Limit-Up Stock: Jingyao Pharma recorded 6 consecutive limit-ups, becoming today’s highest consecutive limit-up stock. Its industry is chemical pharmaceuticals, which has a weak correlation with the current AI main theme. Its ascent is more due to independent sentiment-driven speculation and oversold rebound logic.

Consecutive Limit-Up Ladder: 2-consecutive limit-up stocks included Huiyuan Comm., Xinneng Taishan, and Chongqing Pharma, belonging to communications equipment, power grid equipment, and pharmaceutical commercial sectors, respectively. The number of first limit-up stocks was quite high, with communications equipment, software development, and optical optoelectronics stocks showing particular prominence, forming a resonance with the AI main theme.

Interpretation of Failed Limit-Up Pool: Signals from the failed limit-up pool are worth noting. Major thematic stocks like Hengtong Optic-Electric and Yunnan Germanium, despite experiencing failed limit-ups, still closed with strong gains and significant turnover. This indicates healthy divergence and robust buying support, suggesting high investor confidence in the thematic leaders, where divergence is seen as an opportunity to add positions. In contrast, stocks like Tongda股份 and Xinzhonggang, which were high-tier limit-ups on the previous day, plunged after failing their limit-up, signaling accelerated risk release for non-thematic high-valuation stocks—a typical sign of high-level deceleration. CNPC Capital’s large failed limit-up also highlighted capital divergence in broad financial concept stocks.

4. Analysis of Key Volatile Stocks

1. InfiNet Technologies (300308): Turnover reached CNY 17.695 billion, with a gain of +4.21%. As the undisputed leader in the CPO (Co-Packaged Optics) field, its high turnover and sustained rise reflect the core beneficiary logic stemming from the explosion in AI computing power demand. Market expectations for its performance growth are strong, and capital continues to flow in, making it a core allocation target for AI infrastructure construction.
2. Hengtong Optic-Electric (600487): Turnover of CNY 9.807 billion, with a gain of +8.73%. The company possesses deep expertise in optical communications. Today’s surge on high volume, despite a failed limit-up, showed strong buying support at high levels. This indicates that capital’s recognition of the CPO and optical communication sectors has moved from pure thematic speculation to a “resilient sector” driven by both fundamentals and trends.
3. Dexinli (688205): Closed limit-up at +20.00%, with turnover of CNY 3.894 billion. As an active stock in the CPO concept, despite 9 failed limit-up attempts during the day, it ultimately closed at the limit-up price, demonstrating strong bullish strength. This is often a signal of capital spreading to second-tier stocks when sector sentiment is high, also reflecting the intensity of high-stakes speculation.
4. Jingyao Pharma (600488): 6th consecutive limit-up, with a gain of +9.94%. As a representative of current market’s high-tier consecutive limit-ups, its rise is primarily due to an oversold rebound in the pharmaceutical sector or sentiment-driven continuation sparked by news, with no direct connection to the AI main theme. Its risk increases with rising price levels; investors should be wary of capital realization.

5. Next Day Trading Strategy Recommendations

Observation Points:

• Can the AI optical communications main theme continue its strength? Pay close attention to internal stock rotation and buying support after divergence, especially for high-turnover stocks with significant capital inflow.
• Monitor for potential catch-up gains or rotation in other AI industry sub-sectors (e.g., AI chips, servers, liquid cooling).
• Whether high-tier limit-up stocks like Jingyao Pharma can continue to extend their gains, though risks remain extremely high.
• Guard against the risk of corrective declines in previous high-tier consecutive limit-up stocks not in the main theme, especially those that failed their limit-up and closed down yesterday.

Operational Stance: The current market exhibits typical structural conditions, where the strong get stronger, and the weak get weaker. Amidst a market-wide correction, it is still necessary to remain cautious and control overall positions, but active participation in mainstream market hotspots is possible. The strategy should be to “focus on the main theme, buy on dips, strictly set stop-losses, and avoid blindly chasing non-thematic stocks at high prices.”

Key Stock Trading Recommendations:

• InfiNet Technologies, Hengtong Optic-Electric, and other core AI optical communications stocks: If a healthy pullback occurs on the next day, it can be seen as an opportunity to buy on dips; existing holders should continue to hold, closely monitoring trading volume and stock price trends.
• Dexinli, Fuzhou Rockchip Tech, Tongyu Comm., and other strong first limit-up / second-tier AI optical communications stocks: Observe buying support at the market open on the next day. If capital flows back, small positions can be taken, but strict stop-loss levels must be set.
• Jingyao Pharma and other high-tier consecutive limit-up stocks: Primarily observe, new entries are not recommended. Existing holders may consider partial profit-taking to lock in gains and mitigate risk.
• CATL, Sungrow Power Supply, and other new energy blue-chip stocks: Capital attention remains low in the short term; it is advisable to continue observing and await clear stabilization signals and signs of capital inflow.

Note:

1. Data source: AKShare.
2. This article is AI-assisted and intended to provide market insights and data analysis, not investment advice.
3. Disclaimer: Investing involves risks; exercise caution when entering the market. The content of this article is for reference only and does not constitute any investment advice or recommendation. Please make independent judgments based on your own circumstances.