Effective October 26, 2026, the revised compilation methodology for the SSE series of composite indices, jointly developed by the Shanghai Stock Exchange and CSI Index Co., Ltd., will be officially implemented. This revision covers four core indices: the SSE Composite Index, the SSE A‑Share Index, the SSE Tradable Index, and the STAR Market Composite Index. The key adjustments comprise two measures: first, a cap has been introduced, limiting the weight of any single constituent to no more than 15%, thereby enhancing the index’s representativeness, balance, and resistance to manipulation; second, the exclusion period for risk‑alert securities has been moved forward from “the next trading day after the second Friday of the month following the date of risk‑alert implementation” to “the next trading day after the second Friday of the month following the date of the risk‑alert announcement,” improving the efficiency of index constituent adjustments.
On October 23, the Party Committee of the State-owned Assets Supervision and Administration Commission of the State Council convened a collective study session of its theoretical study center group to study and implement the spirit of General Secretary Xi Jinping’s important speech on carrying forward the great Long March spirit. The meeting explicitly called for “vigorously advancing state‑owned asset and state‑owned enterprise reform and ensuring the solid implementation of tasks to further deepen such reforms.” The meeting emphasized the need to remove institutional and mechanistic barriers that constrain high‑quality development, accelerate the optimization of the layout of the state‑owned economy, strengthen efforts to master critical core technologies, and promote the deep integration of penetrating supervision with Party building and business operations.
On October 25, S&P Dow Jones Indices announced new rules for classifying growth and value stocks, incorporating intangible assets, expected earnings, and free cash flow into the criteria for evaluating value stocks, while removing the past‑12‑month stock price appreciation as a criterion for identifying growth stocks. The revised rules will take effect before the U.S. stock market opens on December 21, local time, and are expected to prompt roughly $375 billion in passively managed funds that track these indices to rebalance their portfolios. Analysts note that this move aims to address the long‑standing distortion in value‑stock valuations, but it may exacerbate structural market volatility in the short term.