Screening Chinese Stocks by Volatility, Price, and Prior Limit-Up Activity

Summary

This screen combines three conditions: daily amplitude above 1%, a closing price of 18.5 yuan, and at least one limit-up event during 2021. It sorts selected stocks by trading value in descending order. The stated rationale is to identify shares with noticeable price movement and a past episode of strong upside activity, but the document does not establish that these traits predict future returns.

The note warns that limit-up events may reflect speculative or manipulated activity and that the filters omit longer-term business quality, growth prospects, and industry conditions. It recommends adding fundamental, sector, and market-trend analysis, together with stop-loss and take-profit controls. The example logic has apparent implementation ambiguities: its daily amplitude test is expressed as a ratio, the limit-up detection described in code does not clearly match the condition, and the sorting example references trading value without showing how it is populated. No backtest results or evidence of effectiveness are supplied.

Key ideas

• The screen requires amplitude above 1 percent and a closing price of 18.5 yuan.
• It also requires a limit-up event during 2021 and ranks candidates by trading value.
• Past limit-up activity may attract speculative trading and is not evidence of durable strength.
• The filters omit fundamentals, sector conditions, and broader market trends.
• The example contains unclear calculation details and provides no performance validation.

Tags

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