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

Summary

This Chinese equity screening idea selects stocks with an amplitude greater than one, a prior-day 9:15 matching price at the lower price limit, and exclusion of the STAR Market. The post interprets large amplitude as a source of potential opportunity and the limit-down matching price as a possible sign of market sentiment. It offers example indicator logic and a Python-style illustration for applying the conditions, though the snippets depend on platform-specific functions and are not a portable implementation as written.

The author cautions that price-only screening ignores company fundamentals and can misclassify stocks. The proposed refinements include adding valuation measures, examining historical amplitude and volatility, and reconsidering whether excluding STAR Market listings makes sense for the situation. No backtest, return series, or risk statistics are provided, so the screen is an idea for further evaluation rather than evidence of an effective trading strategy. Results would also depend on market data definitions and correct implementation of the matching-price conditions.

Key ideas

• The screen combines a large-amplitude condition, a prior-day opening-auction limit-down signal, and exclusion of STAR Market stocks.
• The post treats the auction price as a possible indicator of market sentiment.
• It warns that price action alone omits company fundamentals and can lead to mistaken selections.
• Valuation measures and historical volatility analysis are suggested as additional filters.
• The post gives platform-oriented formula examples but no evidence of strategy performance.

Tags

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