Screening Stocks for Large Ranges, Opening Limit-Down Matches, and Market Value

Summary

This Chinese-language post proposes screening equities for a daily amplitude above 1%, a previous day's 9:15 matched price at the limit down, and market value above 200 million yuan. It suggests selecting a specified number of stocks and provides example formulas and Python-like code. The rationale combines price volatility, opening-market conditions, and company size, with optional ranking by stock popularity.

The post recommends supplementing the screen with technical indicators, industry review, and fundamental analysis. It cautions that small firms can be less stable and that earlier price moves may not be meaningfully related to company size. However, it offers no historical test, benchmark comparison, or evidence that the criteria identify high-quality stocks or reduce risk. The sample code refers to platform-specific functions and data fields that are not defined in the post, so it should be treated as illustrative rather than ready-to-run. The strategy's results would also depend on how the opening match, limit-down status, and market value are measured.

Key ideas

• The proposed filter combines a range threshold, a previous-day opening match at limit down, and a market-value threshold.
• The post suggests ranking a selected number of candidates by stock popularity.
• It recommends adding technical, industry, and fundamental checks to the initial screen.
• The author notes that company size may not explain earlier price movement or eliminate risk.
• No backtest evidence is supplied, and the example relies on platform-specific functions.

Tags

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