Chinese Stock Screen: Seven Down Days, Turnover, and Bollinger Bands

Summary

This Chinese-language post proposes a stock screen combining turnover, a seven-day decline, and Bollinger Bands. The initial logic selects stocks with turnover between 3% and 12%, seven consecutive down days, and a close between the Bollinger middle and upper bands. The post warns that this short-term focus and simple set of conditions may be noisy and may not capture long-term investment value.

Its revised screen adds market capitalization above 10 billion, along with recent year-over-year ROE and net profit growth above 10%. It provides example formula and Python-style screening logic, while noting that data field names may need adjustment. These are proposed filters, not a tested trading system: the post reports no returns, risk statistics, sample period, or evidence that the conditions predict future performance. It suggests adding indicators and adapting criteria, but does not define a validation process.

Key ideas

• The initial screen combines turnover between 3% and 12% with seven consecutive down days.
• It requires the latest close to be between the Bollinger middle and upper bands.
• The revised screen adds market capitalization and year-over-year ROE and net profit growth filters.
• The post cautions that short-term rules can be noisy and fail to capture long-term value.
• The formulas are examples and require matching indicator fields to the data source.

Tags

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