Factor Diagnostics and a China A-Share Index Enhancement Backtest

Summary

This competition update reports diagnostics for the ten highest-ranked anonymous factors and tracks a CSI 1000 enhancement portfolio. Factor profiles include average Barra style exposures and sector-level average Rank ICs, calculated from cross-sectional correlations between factor values and next-period returns. The factor construction methods and ownership are withheld, so the tables describe observed characteristics rather than reproducible signals.

For the portfolio, the report combines the 100 highest-ranked factors by regression importance, then overweights higher-scoring constituents and underweights lower-scoring ones through an exponential score tilt. It reports negative cumulative and annualized excess returns, a negative information ratio, substantial tracking error, a negative excess-return drawdown, and a daily win rate below half. The stated tracking-error constraint is not consistent with the reported tracking error. This is a single-round follow-up with no incremental comparison baseline, and the performance figures are limited to the reported backtest; the document withholds the absolute portfolio and benchmark curves and the evaluation period.

Key ideas

• The factor leaderboard is summarized through style exposures and sector-specific average Rank ICs.
• Factor identities and construction details are not disclosed, limiting independent replication.
• The enhancement portfolio tilts CSI 1000 constituent weights according to a composite factor score.
• Reported excess performance is negative, and reported tracking error exceeds the stated constraint.
• The first-round report has no baseline for measuring the marginal contribution of newly added factors.

Tags

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