Screening Large-Cap Chinese Stocks by Range and Opening Gap

Summary

This Chinese community post describes an equity screen requiring a price-range condition, circulating market value above 10 billion yuan, and a 9:25 a.m. gain below 6 percent. The rationale is to find larger companies with some price movement while excluding stocks that have already risen sharply before the open. It provides a formula reference and a Python sketch that draws on stock, daily, and minute-level data; the post frames the method as a short-term selection approach.

The author warns that the filters omit company fundamentals, may miss stronger businesses, and may lose effectiveness as opening prices and ranges change. Suggested improvements include adding financial measures such as profit growth and leverage, combining fundamental and technical inputs, or considering machine-learning methods. The document does not present a historical backtest, portfolio results, or evidence supporting the proposed risk reduction. Its code and data fields may require adjustment, and the exact meaning and calculation of the range and opening return should be checked against the chosen data source before evaluation.

Key ideas

• The screen selects stocks with a price-range condition and circulating market value above 10 billion yuan.
• It excludes stocks whose 9:25 a.m. gain is 6 percent or more.
• The post describes the method as focused on short-term market conditions and notes that it omits fundamentals.
• It suggests combining financial and technical measures, but provides no backtest or performance evidence.

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