I received a question from a software vendor: “[can you build] a composite from the security-level holdings of member portfolios met GIPS(R) [Global Investment Performance Standards] rather than asset-weighting the ROR’s? We have a client that wants to do this but I question whether it meets GIPS standard?”
The answer is “no,” because the standards require composites to include cash and (as of 1 January 2010) cash must be managed separately.
However, if a firm wishes to do this for supplemental information purposes (e.g., to highlight their performance in particular asset classes, market segments, etc.) this would be fine. With supplemental information firms have a lot of options regarding how they can provide prospective clients their performance and risk information.