Chinese Stock Screen Using Price Range and Opening Auction Return

Summary

The document outlines a Chinese stock selection rule combining daily price movement, a price threshold, and the return implied by the opening auction. It describes screening for amplitude above 1, a close below 20, and an auction return between -2% and 5%. It also gives formula examples for implementing the screen in charting software and Python, using the prior close to calculate amplitude and the opening gap.

The rationale offered is that a bounded opening return may help identify stocks with favorable short-term direction. No backtest, performance statistics, or comparison with alternative rules is provided, so the claimed usefulness is not demonstrated. The article itself flags overfitting, changing fundamentals, and sentiment effects on auction prices as risks, and suggests combining technical and fundamental inputs. Its formula examples are not fully consistent: the charting expression uses a different amplitude calculation and a mismatched variable, while the prose and Python version use other definitions. These discrepancies should be resolved before implementation.

Key ideas

• The screen combines daily amplitude, a closing-price cutoff, and an opening-auction return range.
• The auction return is calculated relative to the previous close.
• The article provides implementation examples but no measured trading results.
• Historical screening rules may overfit and may not adapt to changing market conditions.
• The displayed formulas contain inconsistencies that require clarification before use.

Tags

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