Order-Flow Factors by Trade Size and Return Regime in A-Shares

Summary

This research note examines an active-trading factor, called ACT, that characterizes aggressive versus passive order flow in China’s A-share market. It reports that the standard ACT measure has limited stock-selection ability, then splits observations by return regime and trade size to expose differences in how order flow relates to future selection outcomes. Large and medium trades show stronger positive effects in the higher-return segment, while small trades show a more pronounced negative effect in the lower-return segment. Very large trades have weak effects in either direction.

The authors combine large- and medium-trade signals into a positive ACT factor and use small-trade activity for a negative ACT factor. They report stronger performance for the positive factor and a long-short return-to-volatility ratio of 3.06 at a stated 10% split. The note also says the small-trade factor’s returns weakened in recent years. These are reported findings, not independently validated here; the excerpt omits full methodology, sample details, and the underlying analysis needed to assess robustness.

Key ideas

• The standard active-trading factor is reported to have weak stock-selection power.
• Splitting observations by return regime reveals different factor effects across trade sizes.
• Large and medium trade activity is associated with stronger positive selection effects in the higher-return segment.
• Small trade activity has a stronger negative selection effect in the lower-return segment.
• The reported positive composite factor outperforms the small-trade negative factor, though the excerpt lacks full validation details.

Tags

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