Screening for High Auction Activity After a Limit-Down Match

Summary

The document describes a stock-selection screen for shares with a daily amplitude above a threshold, placement among the five highest stocks by current auction amount, and a prior-day 9:15 indicative match at the down-limit price. The proposed rationale is that high range and auction activity may identify active stocks, while a limit-down indication could reflect a potential rebound opportunity. It sketches conditions for a screening formula and provides a Python-style example, but does not define a tested entry, exit, or portfolio process.

The author cautions that the screen omits company financial condition and that a limit-down indication may result from adverse company-specific developments rather than undervaluation. Additional fundamental and contextual checks are suggested. The document offers no empirical evidence, backtest, transaction-cost analysis, or clarification of data availability and timing for the auction fields. Its explanation of why the signal might work is speculative, so the conditions require careful data validation and historical testing before they can support a trading conclusion.

Key ideas

• The screen combines daily price amplitude, a top-five auction-amount rank, and a prior-day indicative match at the down-limit price.
• The author interprets activity and a limit-down indication as possible signs of a trading opportunity, without supporting evidence.
• Company fundamentals and the reason for the limit-down condition may materially change the interpretation.
• The example does not establish entry, exit, or portfolio rules.
• No backtest or transaction-cost analysis is provided, and auction data assumptions need validation.

Tags

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