Screening Profitable Companies by Market Capitalization and Buying Activity

Summary

The post describes an equity screen combining company profitability, market capitalization, and a measure of today’s increase in holdings. Its stated conditions include companies without losses and a buying-activity threshold above 5%. The title refers to companies within a 10 billion market-cap limit, while the prose says to select companies above that size, so the size condition is inconsistent. The example code is also malformed and does not clearly implement the stated buying-activity rule.

The author suggests adding measures of profitability, growth, valuation, and industry or macroeconomic data to broaden the analysis. The post gives no performance results or evidence that the screen predicts returns. It cautions that financial and trading data can be incomplete or inaccurate, and that a high daily increase in holdings may reflect short-term sentiment rather than durable investment value. Treat the rules as a rough screening concept that needs clarification and testing before use.

Key ideas

• The proposed screen combines profitability, market capitalization, and daily buying activity.
• The stated market-capitalization condition conflicts between the title and the explanatory text.
• The example code is malformed and does not reliably express the described trading rule.
• The author suggests adding growth, valuation, industry, or macroeconomic measures.
• Data quality and the short-term nature of holdings changes limit the screen’s usefulness.

Tags

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