Screening Stocks by Daily Range, Listing Age, and Three-Day Decline

Summary

The screen selects listed Chinese stocks with an amplitude above one, more than three years since listing, and closing prices that fell on each of the last three sessions. Its stated rationale is to seek actively traded shares while excluding newer listings, then identify stocks showing a short run of price weakness. The post also includes a Python example that retrieves stock and daily data, applies listing and price filters, and returns selected symbols up to a requested count.

The author cautions that the screen omits macroeconomic, policy, and other influences, and that a three-day decline may reflect a severe selloff rather than an opportunity. The narrow conditions can also leave too few candidates. No backtest or return evidence is reported, and the selection rationale does not establish profitability; the post suggests combining the filters with other measures such as market attention and company fundamentals.

Key ideas

• The screen combines an amplitude threshold, a minimum listing age, and three consecutive lower closes.
• The stated rationale is to avoid recently listed stocks and focus on shares with both activity and recent weakness.
• The accompanying example filters stock data and excludes some listings before returning candidates.
• A short declining sequence can signal continued deterioration, and the post identifies this as a key risk.
• The post reports no backtest evidence and recommends considering additional market and company information.

Tags

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