Screening Large-Cap Stocks by Opening Gain and Price Amplitude

Summary

This Chinese equity screen selects stocks with circulating market capitalization above 10 billion yuan, price amplitude greater than 1, and a 9:25 a.m. gain below 6%. The post frames the size filter as focusing on larger companies, the amplitude condition as retaining stocks with price movement, and the opening-gain cap as avoiding shares that have already risen sharply before trading begins. It also includes sample indicator logic and a Python sketch for applying the conditions.

The author cautions that the rules omit company financials and are oriented toward short-term market behavior. The post notes that opening gains and amplitude can change quickly, which may limit the screen’s persistence. It provides no historical results or evidence that the filters lower risk or improve returns. The code’s data fields and amplitude calculations are not fully consistent with the stated criteria, so the implementation would require validation against reliable intraday and daily data before use.

Key ideas

• The screen requires circulating market capitalization above 10 billion yuan, amplitude above 1, and a 9:25 gain below 6%.
• The opening-gain cap is intended to avoid stocks that have already risen sharply before trading.
• The post flags missing fundamental analysis and the short-term nature of the filters.
• No backtest is provided, and the sample code requires data and formula validation.

Tags

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