Well, Linda,
I like keep things punny also. Sometimes I get confused is I don't use math: If a Pundit does his thing, does he try to make it funny or punny?
Anyway, the ROI yield for an AIM portfolio as a comparison to B/H performance is like comparing apples to prunes.
They AIN'T the same.
I think we might use a different name for the B/H reference. After all, day traders do not call there technique the Buy and Dump method. What the B/H reference Yield intends to provide is simply the simple stock price appreciation reference rather than a comparison to an arbitrary investment technique.
We could use the term Share Price Appreciation(SPA) for this.