...
In standard notation, the unadjusted Geometric effects (shown with superscript GU) have the property:
The Geometric Method effects (shown with superscript GM) have the property:
The allocation effect (A) is shown above, but the same relationships are true for all the attribution effects.
The Geometric Method allocation adjustment is:
Similarly, the Geometric Method selection adjustment is:
The single currency Geometric Method allocation and selection effects compound to the geometric excess return. This is true at the sector and total levels for single periods and combined periods:
.
Each of the combined period effects for sectors and the total level are calculated by compounding the effects from the individual periods. The allocation effect is shown in the following formula:
...