Diagnosing Chinese Stock Screens Using Capital Change Data

Summary

The post describes a modified Chinese stock selection strategy that combines changes in executive shareholdings or share repurchase cancellations with momentum ranking. Its author reports that backtest return and drawdown metrics look acceptable, yet spot checks found selected stocks that did not appear to meet either event condition in company disclosures. The post asks whether the strategy logic is faulty and how the platform’s cn_stock_capital reason field is updated and aligned to rebalance dates.

It also raises a data interpretation issue: executive share changes may represent purchases or sales, while the available field reportedly records a change without its direction. The document does not include the strategy code, platform documentation, or answers to these questions, so it offers no way to verify implementation, publication timing, or trade direction. Its value is mainly as a checklist of event-data validation concerns when combining corporate actions with momentum screening.

Key ideas

• The strategy combines executive share changes or repurchase cancellations with momentum ranking.
• Backtest metrics alone do not establish that each selected stock met the intended event conditions.
• The timing and update frequency of capital change fields affect whether they are usable at a rebalance date.
• A change record without direction cannot distinguish insider buying from selling.
• The post raises diagnostic questions but does not provide code or resolve them.

Tags

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