A Volatility, Recent Limit-Up, and Market-Capitalization Stock Screen

Summary

This note presents a Chinese equity selection rule that combines three conditions: daily amplitude above 1, at least one limit-up session within the prior 25 days, and circulating market capitalization between 5 billion and 10 billion yuan. It includes sample indicator and Python logic for identifying stocks that meet the criteria. The proposed rationale is that larger price swings and a recent limit-up may signal active price behavior, while the capitalization range narrows the universe to companies of a specified size.

The article supplies no backtest, return series, or comparison with a benchmark, so the claimed connection between these conditions and future gains is unverified. It identifies weak fundamental analysis, poor market conditions, and rapid rotation in market attention as risks. It recommends adding company and industry assessment, diversifying technical signals, and monitoring positions for timely exits. The sample code also contains implementation choices that should be checked against the intended definitions and market data before use; the screen itself does not specify portfolio sizing or a complete exit rule.

Key ideas

• The screen requires amplitude above 1, a limit-up day in the previous 25 days, and circulating capitalization within a stated range.
• The article presents recent limit-up activity and volatility as selection clues, but does not validate them with performance evidence.
• Weak fundamentals, adverse market conditions, and fast-changing market themes are cited as risks.
• Suggested improvements include fundamental checks, a broader set of technical signals, and active risk monitoring.
• The examples do not define a full portfolio or exit process and require implementation review.

Tags

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