Screening Chinese Stocks by Turnover, Reversal, and Bollinger Bands

Summary

This stock-selection idea screens for turnover between 3% and 12%, a reversal-style price pattern, and a close between the middle and upper Bollinger Bands. The accompanying formula applies the conditions to listed Shenzhen stocks and describes the reversal with intraday high and low thresholds relative to the prior close. The stated rationale is to combine liquidity, price behavior, and a position within the bands.

The post includes formula and Python examples, but the Python sketch has implementation gaps: its rolling band calculations are not clearly aligned by symbol with the selected rows, and its reversal measure is calculated without being applied as a filter. The document offers no backtest results or performance evidence. It warns that technical screening can omit fundamentals and that Bollinger Bands may not forecast price changes reliably; the proposed additions of financial and valuation measures are suggestions rather than tested improvements.

Key ideas

• The screen combines a 3% to 12% turnover range with a reversal-style condition.
• It selects closes above the Bollinger middle band and below the upper band.
• The formula limits its universe to listed Shenzhen stocks.
• The examples do not provide performance evidence, and the Python sketch has alignment and filtering gaps.
• The author notes that technical indicators omit fundamental information and can fail as market conditions change.

Tags

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