Brinson Fund Performance Attribution with BF Decomposition and GRAP Linking

Summary

The document explains how Brinson attribution uses portfolio holdings to separate active return into allocation and security-selection effects. The framework can be applied across industries for equity funds or across broad asset classes for mixed-asset funds, and can examine single periods or multiple periods. It describes constructing hypothetical portfolios to compare manager decisions with a benchmark and assess where excess return came from.

For single-period attribution, it contrasts BHB, which reports allocation, selection, and interaction effects, with BF, which folds the interaction into the other effects and adjusts allocation calculations relative to overall benchmark return. The report favors BF as a clearer measure of individual allocation contributions. For multi-period analysis, it compares six linking approaches and favors GRAP, which assigns compounding from reinvested excess returns to the period where those returns arose. Examples cover one equity fund and one mixed fund, but the supplied text gives no numerical findings. The authors caution that historical attribution methods may lag changes in market behavior, and the selected funds do not represent all markets or fund types.

Key ideas

• Brinson attribution decomposes a fund’s excess return into allocation and security-selection contributions.
• Equity funds can be analyzed by industry, while mixed-asset funds can be analyzed by broad asset class.
• The BF method does not report interaction as a separate contribution and is presented as a clearer allocation measure than BHB.
• Multi-period attribution must account for compounding from reinvested excess returns.
• The report favors GRAP because it assigns reinvestment effects to the period that generated the excess return.

Tags

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