A High Volatility Pullback Screen for Chinese Equities

Summary

This stock screen selects equities with an amplitude above a threshold, excludes stocks that closed at the limit the prior day, and targets names whose daily percentage change falls within a narrow negative range. The stated rationale is that amplitude captures short term movement, while avoiding prior limit up stocks removes especially prominent recent movers. The day’s decline is intended to reflect current market sentiment and price action.

The article offers no performance test or investment evidence. It warns that the screen can select risky stocks, omits company fundamentals, and may miss rebounds because its decline interval is narrow. Its example code has conditions that do not fully correspond to the written logic, so implementation fidelity should be checked before use. The author suggests adding fundamental filters and broadening the decline range, but does not report results for those changes.

Key ideas

• The screen combines elevated price amplitude, prior day limit status, and a specified daily decline.
• The intended setup seeks volatile stocks after excluding those that closed at the upper price limit previously.
• The article gives no backtest results to support the screen’s effectiveness.
• The narrow decline band, missing fundamental filters, and code mismatch limit confidence in the example.

Tags

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