Market phase transition signals end of speculative cycle
The China stock market rotation accelerated in early September as capital flowed from high-positioned speculative names into sectors with confirmed industrial logic and earnings visibility. Trading volume fell to 1.76 trillion yuan on September 3, marking two consecutive days below the 2 trillion yuan threshold that traders view as a sentiment watershed.
The seal rate, which measures the percentage of stocks hitting daily limits that maintain those gains through the close, dropped sharply from 93% on September 1 to 57% on September 3 before recovering slightly to 59% on September 4. The number of consecutive board stocks fell from 18 to just 7, while the promotion rate for stocks attempting to extend their winning streaks declined to 33.33%, indicating heightened risk for momentum chasers.
High-positioned agricultural and pharmaceutical stocks triggered batch limit-downs, with names including Aili Home, Deep China A, Dunhuang Seed and Shenqi Pharma leading the decline. The negative feedback loop from these previous market favorites has compressed overall market height and increased the cost of speculation.
Liquid cooling emerges as confirmed mainline
China liquid cooling stocks have established themselves as the primary beneficiary of the market rotation, with Jitian shares achieving four consecutive daily limits through September 3-4. Jindi shares and Jin Fu Technology maintained their winning streaks as the sector entered a critical earnings delivery phase.
The industrial logic supporting liquid cooling has become unavoidable. AI chip power consumption has exceeded 1,000 watts, making traditional air cooling insufficient for thermal management. Liquid cooling servers have become mandatory rather than optional as data center operators scale up artificial intelligence infrastructure.
Upstream components are experiencing inflationary pressure. Multilayer ceramic capacitors face shortage conditions, while copper-clad laminates have seen seven price increases within the year, accumulating over 100% in total gains. The AIDC power supply and liquid cooling sectors are now in a key earnings realization period, with Nvidia's Vera Rubin platform production and domestic cloud service provider capital expenditure increases providing additional catalysts.
Defense sector demonstrates避险 and offensive characteristics
China defense stocks outperformed during the broader market decline on September 2, with military equipment and trade-related names attracting both避险 and offensive capital flows. Inner Mongolia First Machinery advanced to a two-day winning streak, while Construction Industry and Great Wall Military Industry hit daily limits.
The 80 companies covered by the CSI Military Industry Index reported aggregate net profit growth of 32.92% year-over-year in the first half of 2026, according to disclosed earnings. Public fund active allocation ratios for the sector have fallen to levels not seen since 2023, creating potential for position rebuilding.
Geopolitical catalysts including escalating U.S.-Iran tensions, the November Zhuhai Airshow and the 15th Five-Year Plan provide multiple catalysts for sustained interest. The defense sector has demonstrated the ability to perform both as a risk-off haven during market stress and as an offensive position during recovery phases.
Structural rotation favors fundamentals over sentiment
The current market environment reflects a seesaw effect between technology growth sectors and defensive dividend or consumption names. Capital has rotated from high-positioned agricultural and pharmaceutical stocks into lower-valued liquid cooling and defense names, with small-cap speculative stocks significantly outperforming large-cap heavyweight names within each sector.
Market participants are advised to maintain total positions at 50-60% levels, with offensive allocations of approximately 30% focused on liquid cooling and AI computing hardware upstream, plus defense. The remaining 20-30% should be held in reserve for confirmation signals before additional deployment.
Key indicators to monitor include whether trading volume can stabilize above 1.8 trillion yuan for two consecutive days, which would confirm sentiment recovery. The seal rate's ability to return above 70% would indicate renewed appetite for momentum positions. Jitian shares' ability to maintain its winning streak will test the liquid cooling mainline's sustainability, while the count of high-positioned stocks hitting limit-downs will signal whether negative feedback effects have subsided.
International oil prices present an external risk factor, with Brent crude above $94 per barrel. A breach of $100 would likely increase避险 sentiment and pressure high-valuation growth stocks through the energy price to macro inflation to central bank policy transmission channel. The 10-year U.S. Treasury yield at 4.75% and Federal Reserve rate hike probability of 50-65% for September create additional headwinds for risk assets.
The market has entered a phase where earnings realization and industrial logic matter more than pure sentiment. Sectors without order verification or performance support face near-zero tolerance for speculation, while names with confirmed fundamentals and pricing power are attracting sustained capital inflows.