Chinese Stock Screen for Sharp Intraday Declines and Bid-Side Volume

Summary

This Chinese-market stock screen selects shares with an intraday range above one percent, a session low between four and five percent below the prior close, and first-level bid volume greater than first-level ask volume. The stated rationale combines price movement with an order-book measure intended to indicate buying interest. The accompanying Python example also filters out certain names and stocks using size, price-to-book, and price-to-earnings conditions, so its implementation is narrower than the three headline criteria alone.

The post characterizes sentiment and market risks, as well as false signals from noisy or incomplete low-frequency data, as important limitations. It suggests combining the screen with indicators such as MACD or RSI and considering trading volume. It provides no backtest, out-of-sample evidence, or measured returns, and a snapshot of top-of-book volume may not reliably represent broader demand or predict a reversal.

Key ideas

• The headline screen combines an intraday range threshold, a bounded decline from the prior close, and stronger best-bid than best-ask volume.
• The example code adds exclusions based on stock name and valuation or size fields.
• The post interprets bid-side volume as a measure of buying interest.
• It identifies sentiment shifts and noisy or missing data as sources of risk.
• No performance evidence is provided, and the proposed indicator additions are suggestions rather than tested improvements.

Tags

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