A Chinese Stock Screen for Large Amplitude and Prior-Day Limit-Down Signals

Summary

The document describes a Chinese stock selection rule combining an amplitude threshold, a prior-day signal tied to the 9:15 matching price and limit-down conditions, and a specified closing price. It suggests sorting qualifying stocks by popularity and taking the first n, and includes example indicator logic and a Python-style implementation outline.

The accompanying discussion frames the screen around volatility and market sentiment, but gives no backtest, performance evidence, or precise rationale for why these conditions might predict returns. The text also conflicts on the target price: its title says 18, while the body specifies 18.5. It warns that short-term price moves, sentiment, and liquidity can create risk, and suggests adding fundamental, financial, and capital-flow information and diversifying across industries. Treat the rule as an unvalidated screening example; the source says further analysis is needed before use.

Key ideas

• The screen combines amplitude, prior-day opening auction and limit-down conditions, and a specified stock price.
• The body specifies a price of 18.5, while the title refers to 18, creating an inconsistency.
• The example ranks selected stocks by popularity and retains a chosen number.
• The source identifies short-term volatility, sentiment, and liquidity as risks.
• It recommends validating the screen and considering fundamental, financial, and capital-flow data.

Tags

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