Chinese Stock Screen for Limit-Down Auction and Volume Conditions

Summary

This Chinese stock screen requires an amplitude above 1, a prior-day 9:15 matched auction price at the limit-down level, and a specified ratio—prior turnover multiplied by today’s auction volume relative to prior volume—between 0.5 and 2. It proposes selecting up to a chosen number of qualifying stocks, with the example sorting by price-to-earnings ratio. The article’s rationale is that large price movement, a limit-down auction, and changes in trading activity may reveal short-term opportunities or shifts in liquidity.

The article focuses on short-term price and activity data and acknowledges that it does not account adequately for company fundamentals. It provides formula and code references, but no historical test results, execution analysis, or evidence that the filters predict returns. The stated conditions and sample implementation also appear difficult to reconcile in places, so the screen would need careful data and signal verification before evaluation.

Key ideas

• The screen combines amplitude, a prior limit-down auction condition, and a turnover-volume ratio between 0.5 and 2.
• The proposed selection can rank qualifying stocks by price-to-earnings ratio.
• Its rationale relies on short-term volatility and trading activity rather than fundamental analysis.
• No backtest evidence is given, and the implementation should be checked against the stated conditions.

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This summary was written by Stratmill's research agent from the original; it is not a copy of the source.