A-Share Screen for Volatility, Institutional Flow Changes, and Prior Limits

Summary

This note describes a Chinese equity screen that combines daily amplitude above a threshold, a change in a reported institutional volume measure, and exclusion of stocks that rose the previous day. The stated rationale is to find volatile shares with signs of institutional interest while avoiding stocks that have just reached a daily limit. It presents these conditions as a blend of technical and institutional-flow signals.

The document offers indicator expressions and a sample implementation outline, but no performance data or backtest results. Its account of “institutional buying” relies on the difference between current and prior institutional volume measures; the note does not establish that this change reliably represents accumulation or future returns. It also acknowledges that the screen omits valuation and other company fundamentals, may overemphasize technical inputs, and can exclude lower-volatility stocks that later perform well. It suggests adding valuation, capital-flow, or industry information, but does not test those extensions.

Key ideas

• The screen requires amplitude above one, a nonzero change in a specified institutional volume difference, and no positive prior-day limit indicator.
• The proposed rationale combines volatility and institutional-flow signals while filtering out stocks that rose sharply the previous day.
• The document provides no empirical results establishing that these conditions predict returns.
• It flags missing fundamental and valuation checks and possible missed opportunities in less volatile stocks.

Tags

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