Stock Screening After a Prior Opening Auction Limit-Down Signal

Summary

The document proposes a Chinese stock screen combining a daily amplitude threshold, a prior-day 9:15 matching price at the limit-down level, and a current gain between -5% and 2.6%. It suggests sorting qualifying stocks by total market value and selecting a chosen number. The rationale offered is that large amplitude may signal opportunity, the opening match may reflect market sentiment, and recent price change can indicate short-term momentum.

The post provides indicator references and an illustrative Python outline, but it does not present backtest results or evidence that the screen is profitable. It warns that the conditions omit company fundamentals and that short-term gains do not describe longer-term direction. Suggested refinements include adding valuation and financial data, combining technical indicators, and applying stop-loss and position controls. The screening logic is therefore a simple hypothesis that requires independent testing and risk controls.

Key ideas

• The screen combines amplitude, a prior opening auction limit-down condition, and a bounded price change.
• It proposes ranking selected stocks by total market value.
• The post gives no performance evidence for the selection rule.
• It recommends adding fundamental inputs, other indicators, and risk controls.

Tags

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