dyga

I don't get your question:

In both cases the history must remain with the original composite. You say so yourself.

You must not discard or wish away a composite simply because it has not performed well in the past for you . You can add disclosures that it is discontinued and any existing retained strategies are now moved to a new composite ( for new results only , not the original results).

If you can move portfolios between composites at will , managers will simply attempt to mix and match strategies after the fact , just to look good. The intent is clearly to leave results as they are up to the point of any change . New results only should be included in new composites