Stock Screening for Large Swings, Sharp Declines, and Recent Limit-Ups

Summary

This Chinese-language post outlines a momentum-oriented equity screen. It selects stocks with an amplitude above one, a daily decline between 4% and 5%, and at least one limit-up session during the prior month. The proposed interpretation is that a recent limit-up may indicate short-term attention or momentum, while the current decline identifies a volatile pullback. The article includes example indicator logic and Python-style screening code for checking the current session and recent price history.

The post acknowledges that volatile stocks can be difficult to trade, that relying on recent strength may encourage chasing, and that the screen offers weak predictive power on its own. It suggests adding indicators, fundamental or flow data, and stop-loss controls. It provides no backtest, sample of qualifying stocks, or measured returns. The examples also rely on assumptions about price limits and data handling, so they need adjustment for market rules, stock-specific limits, and the precise meaning of amplitude before use.

Key ideas

• The screen combines high daily amplitude with a decline between 4% and 5%.
• It also requires a limit-up event during the previous month.
• The post frames the setup as a volatile pullback after recent momentum.
• It warns that volatility and trend-chasing can make the selection risky.
• No performance evidence is provided, and market-rule assumptions in the sample code need validation.

Tags

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