Stock Screening by Amplitude, Float Value, and Shareholding Concentration

Summary

The proposed screen targets mainland Chinese stocks using three characteristics: price amplitude above one, circulating market value above 10 billion yuan, and a shareholding-concentration measure described as below 20 percent. The article frames these conditions as a way to combine price movement, company size, and ownership structure, while excluding smaller firms and highly concentrated holdings. It also suggests that volatility, valuation, and governance could be considered together when creating a candidate list.

The document provides no backtest, portfolio results, or evidence that these filters identify stable or undervalued companies. It acknowledges that concentration alone can overlook profitability and other fundamentals, and suggests adding valuation or technical measures. The stated concentration condition is internally inconsistent: the prose describes a measure both above 70 and below 20 percent, while the sample code repeats an impossible interval. The code's amplitude calculation and data fields also do not cleanly establish the stated screen, so the criteria need clarification before implementation.

Key ideas

• The screen combines price amplitude, circulating market value, and shareholding concentration.
• The stated float-market-value threshold is above 10 billion yuan.
• The article provides no backtest or return evidence for the selection criteria.
• The concentration threshold is contradictory in the prose and impossible in the sample code.
• The document suggests adding financial or technical measures to avoid relying on one ownership metric.

Tags

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