Screening Stocks by Amplitude, Control Measure, and Date

Summary

This screening proposal combines three conditions: price amplitude above one, a value for today’s control measure above 21, and a date in or after 2021. The description frames the first two conditions as filters for more volatile stocks and stocks with greater market influence, while the date condition limits eligible observations to a particular period. It presents formula and Python-style examples, but does not define the control measure clearly or explain how the conditions are normalized or combined for ranking.

The page gives no backtest, selected-stock examples, or return and risk statistics, so it does not establish that the screen identifies profitable opportunities. It warns that the filters may neglect fundamentals and longer-term trends, that amplitude thresholds may not transfer across markets, and that trading costs can undermine results. The proposed improvement is to add relevant fundamental and technical measures, adapt volatility thresholds to market context, and account for implementation costs. The date filter also makes the screen tied to its stated historical period rather than a complete standalone strategy.

Key ideas

• The screen combines an amplitude threshold, a control measure threshold, and a date condition.
• The text treats amplitude as a volatility filter and the control measure as a proxy for market influence.
• The control measure and ranking procedure are not clearly defined.
• No performance results or test methodology are provided.
• Fundamentals, market-specific thresholds, and transaction costs may change 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.