Chinese Stock Screen Using Amplitude, Control Change, and Bid Ask Volume

Summary

This stock-selection example combines three filters: daily price amplitude above 1, a controlling-shareholder measure whose absolute daily change exceeds 21, and best-bid volume greater than best-ask volume. The accompanying rationale presents the criteria as a way to find stocks with notable price movement, concentrated control, and stronger displayed buying interest. It also gives sample implementations in a Chinese trading platform’s formula language and Python, including a ranking step based on market capitalization or fund-flow ranking.

The article offers no backtest, performance results, or evidence that the filters predict returns. It acknowledges that the approach omits broader company and industry factors and may be exposed to market sentiment. The code is illustrative, and the article recommends adding fundamental and technical measures and applying risk controls; those suggestions are not developed or validated as part of the screen.

Key ideas

• The screen requires price amplitude above 1 and a large absolute daily change in its control measure.
• It compares displayed best-bid volume with best-ask volume as a buy-side pressure filter.
• The article supplies example implementations and a ranking step but no performance evaluation.
• The stated criteria omit company and industry information and may be sensitive to sentiment.
• The article suggests broader factors and risk controls without testing their effects.

Tags

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