Screening for Seven Consecutive Down Days with a Turnover Filter

Summary

This Chinese-language post outlines a historical stock-selection rule: select shares with turnover between 3% and 12% that recorded seven consecutive daily declines during 2021. It presents this as a way to identify possible rebound candidates after a prolonged losing streak. The article includes example formula logic and a Python-style implementation, but reports no selected stocks, backtest, or measured rebound results.

The author flags overfitting, limited attention to fundamentals, and vulnerability to short-term market changes. Suggested refinements include adding technical measures, company fundamentals, and testing across more time windows. The rule’s fixed calendar year makes it a historical screen rather than a complete forward-looking strategy. Its examples also depend on data conventions: turnover units, date handling, and whether the seven-day condition is evaluated at the intended point must be checked before use. The post does not specify an entry, exit, or risk-control plan.

Key ideas

• The screen requires turnover to fall between 3% and 12%.
• It selects stocks with seven consecutive daily closes lower than the preceding closes during 2021.
• The proposed rationale is that a sustained decline may precede a rebound, but no evidence is reported.
• The post warns about overfitting and the omission of fundamental factors.
• The selection rule does not define trade entries, exits, or risk controls.

Tags

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