A Chinese Stock Screen Using Price Range, Float, and Control Ratio

Summary

The document presents a Chinese equity screening rule that selects stocks using three conditions: a minimum daily price range, a cap on tradable share float, and a threshold for a same-day control ratio. It interprets these as filters for active price movement, comparatively smaller share supply, and concentrated trading influence. The article also sketches implementations in indicator formula syntax and Python, with a subsequent ranking step based on turnover. The code examples are references rather than evidence that the screen has been tested successfully.

The author notes important limitations: the meaning of the control ratio is unclear, the screen omits company fundamentals, and adding conditions can reduce the number of qualifying securities. Suggested refinements include combining technical and fundamental information, using additional confirmation criteria, and spreading exposure across holdings. The document does not give a backtest, returns, transaction costs, or a precise operational definition for the control metric, so it describes a screening hypothesis rather than a validated strategy.

Key ideas

• The screen combines a daily range threshold, a maximum tradable float, and a control ratio threshold.
• The examples show how the conditions can be implemented and how qualifying stocks can be ranked by turnover.
• The meaning of the control ratio is ambiguous, which could lead to incorrect selections.
• The article recommends adding fundamental context, confirmation signals, and diversification.
• No backtest or performance evidence is provided.

Tags

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