A-Share Main Board ST Stocks' Daily Price Limit Expanded to 10%
Alina Collins
Starting July 6, China's three exchanges enforce new trading rules: main-board risk-flagged stocks see their daily price limit doubled from 5% to 10%, alongside changes to fund closing auctions and an expansion of after-hours trading — all directly affecting retail investor routines.
What exactly changed?
Main-board risk-flagged stocks — ST and *ST names the exchange has tagged as carrying elevated risk — now move within a ±10% daily limit, matching all other main-board stocks.
Shanghai-listed funds (ETFs, LOFs, REITs) switch from continuous trading to a closing call auction during 14:57–15:00. This means → the last three minutes no longer match orders one by one; instead, orders pool and clear at a single price.
After-hours fixed-price trading expands from the STAR Market to all Shanghai A-shares and ETFs, running 15:05–15:30 at the closing price.
What did Shenzhen and Beijing exchanges add?
Shenzhen introduces a market-maker system on ChiNext — designated firms continuously quote bids and offers to keep smaller stocks liquid — and aligns its main-board risk-flagged stock limit to 10%.
Shenzhen also adjusts block-trade confirmation times and broadens after-hours fixed-price trading.
The Beijing Stock Exchange launches after-hours fixed-price trading for stocks and adds a regulatory framework for severe abnormal volatility. In plain terms = all three exchanges are moving in lockstep to eliminate mechanical gaps between boards.
What should retail investors watch?
Fund end-of-day orders work differently now. During 14:57–15:00, only limit orders are accepted and cancellations are blocked — a sharp change from the old continuous-auction mode where real-time cancellation was possible.
After-hours trading has no investor-qualification threshold. Minimum order size matches regular trading. But execution is at the closing price — no price discovery — and liquidity is far thinner than intraday.
This means → after-hours trading suits the "wanted to buy at the close but missed it" scenario, not short-term spread plays.
The daily limit is wider — should you chase risk-flagged stocks?
Moving from ±5% to ±10% doubles the swing range; gains can be bigger, but so can losses.
Capital-market researchers note these stocks still represent companies with significant operational or other major risks, and delisting risk remains real.
In plain terms = the wider limit is designed to let prices reflect risk more efficiently — it is not an invitation to speculate on ST names. Investors should assess their own risk tolerance and act with caution.
Content is for reference only, not financial advice.