Highlights

Exchanges have revised trading rules to take effect on 6 July 2026 (next Monday). A key change: the daily price limit for main-board risk-warning stocks (ST and *ST) increases from 5% to 10%. Post-close fixed-price trading will apply more broadly to A-shares and ETFs; Beijing Exchange is also introducing post-close fixed-price trading. Other adjustments include changes to fund close-phase trading, market-maker introduction on ChiNext, and updates to block trade timing and supervisory provisions.

Sentiment Analysis

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  The overall sentiment of the article is mixed to neutral: the rule changes are largely procedural and intended to improve market functioning, which is positive, but some adjustments (wider limits on ST stocks) raise investor risk considerations. Regulatory modernization and broader trading options are constructive, yet the increased volatility potential and altered execution mechanics require investor caution.
  


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Article Text

China’s three exchanges—the Shanghai Stock Exchange (SSE), the Shenzhen Stock Exchange (SZSE) and the Beijing Stock Exchange (BSE)—have completed a series of trading-rule revisions that will come into force on 6 July 2026. The amendments touch on multiple market mechanisms, with the most visible changes affecting the handling of risk-warning stocks, the scope of post-close fixed-price trading, and the trading processes for funds and block trades.

Among the core revisions, both the SSE and SZSE will raise the daily price movement limit for main-board risk-warning stocks (commonly referred to as ST and *ST stocks) from 5% to 10%. This change formally increases the permitted intraday volatility for such securities. At the same time, both exchanges are expanding the eligibility of post-close fixed-price trading: what was previously limited to specific boards (for example, the STAR Market or ChiNext) will now apply across A-shares and exchange-traded funds. The BSE is also introducing a stock post-close fixed-price trading mechanism and has adjusted rules around block trades and abnormal fluctuation surveillance.

The SSE’s revisions include extending post-close fixed-price trading beyond the STAR Market to all A-shares and ETFs, changing the fund closing-phase mechanism from continuous auction to closing call auction to determine a single close price, and raising the daily limit for main-board risk-warning stocks to 10%. The SSE also made adaptive edits to disciplinary and rule-language provisions to align with the new mechanics.

The SZSE’s updates introduce a market-maker framework for ChiNext, revise the confirmation windows for negotiated large-block trades on ChiNext (moving from a narrow late-afternoon slot to broader morning and afternoon windows), and expand post-close fixed-price trading to A-shares and ETFs. The SZSE likewise consolidated and adjusted rule language for main-board risk-warning stock limits to match the 10% threshold and refined self-regulatory and disciplinary arrangements.

The BSE’s amendments add a post-close fixed-price trading channel, broaden the price scope for block trades that previously had no price limits, clarify trading rules for risk-warning and delisting-arranged securities, and introduce enhanced measures for handling serious abnormal price movements. The exchange also reorganized certain rule texts for clarity and consistency.

For investors, these changes are mainly procedural but they carry practical implications that merit attention. First, the change from continuous trading to a closing call auction for funds means that the last three minutes of trading will operate under different order and cancellation rules: investors will typically only be able to submit limit orders and will not be permitted to cancel them during the final auction window. This alters execution behavior around the close and could affect fund pricing and order-placement strategies.

Second, post-close fixed-price trading becomes a more widely available option. This session is settled at the official close price, has the same minimum order sizes as auction trading, and normally lasts longer than the continuous session by about 30 minutes. It does not permit traders to set arbitrary prices—trades execute at the close price—so liquidity and the ability to influence price are different from the continuous market. Investors considering using this session should weigh liquidity, the closing price, and their execution objectives.

Third, the relaxation of price limits for main-board risk-warning stocks increases potential intraday moves. While a wider limit can improve price discovery and reduce blockage when substantial news arrives, it also allows larger losses or gains within a single session. Investors should remember that ST and *ST labels still signal elevated operational or delisting risk, so the higher band does not reduce fundamental risk—rather, it changes how quickly that risk can be reflected in market prices.

Overall, the rule amendments aim to refine market structure, enhance trading options, and harmonize practices across exchanges. Most changes focus on operational improvements rather than shifting fundamental investor protections. Market participants should update trading procedures, ensure order-entry practices match the new auction and post-close mechanics, and reassess risk management for risk-warning stocks in light of the wider limits. Staying informed about the precise implementation timings and reading detailed exchange notices will help investors adapt smoothly when the new rules take effect next Monday.

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