Combining Auction Net Buying, Position Increases, and Recent Returns in A-Share Screening

Summary

This post describes a short-term China A-share screening rule that combines three signals: positive net buying by large investors during the opening auction, a daily position-increase ratio above 5%, and a 10-day price gain greater than zero but below 35%. The article interprets these conditions as signs of recent capital inflow and positive, relatively moderate price momentum. It also proposes adding valuation measures such as price-to-earnings and price-to-book ratios, along with moving averages or MACD, as further filters.

The post cautions that these indicators cannot ensure a stock will rise and that changing expectations may lead to sharp price moves. It offers sample data-processing code, but provides no backtest results, defined portfolio construction, execution rules, or evidence that the signals forecast returns. The proposed additions are suggestions rather than tested improvements, and the exact data fields and definitions would need verification before using the screen in research or trading.

Key ideas

• The screen combines opening-auction net buying, a position-increase measure, and 10-day price performance.
• The article treats the conditions as indicators of buying interest and moderate recent momentum.
• It suggests valuation ratios and technical indicators as possible additional filters.
• The post gives no evidence that the screen predicts returns or that the suggested additions improve it.

Tags

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