Stock Screening with Rising 30-Day Averages and Intraday Fund Flows

Summary

The document proposes a Chinese stock-screening rule combining three conditions: today’s increase in shareholding proportion exceeds a threshold, large-order net inflow is positive during the afternoon, and the 30-day moving average is rising. The stated rationale is to identify stocks showing recent capital inflows alongside an upward longer-term trend. It also gives simple reference code for calculating rolling averages and sorting stocks by price change, though that code does not implement the full screening logic.

The author cautions that inflows and an upward average do not guarantee future gains: flows can reverse, funds can exit, and market conditions can change. Suggested refinements include adding volume and turnover measures and checking weekly or monthly horizons. No backtest results, selection universe, transaction costs, or performance statistics are provided, so the screening idea remains an unvalidated starting point rather than evidence of a profitable strategy.

Key ideas

• The screen combines rising shareholding proportion, afternoon large-order inflows, and an upward 30-day moving average.
• Capital-flow conditions may indicate interest but do not ensure prices will rise.
• Flows can reverse, and changing market conditions can undermine the trend signal.
• Volume, turnover, and longer time horizons are proposed as additional filters.
• The document offers no backtest evidence or cost analysis for the screen.

Tags

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