Chinese Stock Screening with Amplitude, Control, and Bollinger Bands

Summary

This short-term stock screen combines daily amplitude, a measure labeled controlling shares, and the closing price’s position relative to Bollinger Bands. The stated conditions are amplitude above one, controlling shares above 21 percent, and a close below the upper band but above the middle band. The document presents this as a way to identify stocks showing short-term price movement while remaining in the upper half of the band range. It also includes example indicator formulas and a Python-style selection workflow, though the formula examples do not consistently match the stated conditions.

The author warns that short-term prices can be affected by unpredictable events or manipulation, and that Bollinger Bands alone may produce limited selections in weak markets. Suggested refinements include combining additional indicators such as MACD, KDJ, or RSI and considering event-related information. No backtest or measured results are provided, and the meaning and calculation of the controlling-shares measure are not established in the text, limiting independent interpretation and reproducibility.

Key ideas

• The stated screen requires amplitude above one, controlling shares above 21 percent, and a close between the middle and upper Bollinger Bands.
• The method targets short-term conditions and relies on technical measures rather than documented return evidence.
• The document cautions that short-term price moves and Bollinger Band signals can be unreliable in some conditions.
• It suggests adding other technical indicators and event information for broader assessment.
• Formula examples do not consistently align with the stated rules, and the controlling-shares measure is not defined.

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