Some people do report higher returns from one of their favorite trading accounts. This does not mean much. I have many accounts, his and her 401k's, IRAs, Roths, after-tax accounts, etc... While I keep track of the overall AA, these accounts do not have the same positions. Some may have more EM, the others more material stocks, etc...
So, I always look at the overall return, computed over every liquid account that I have. And that includes Treasury accounts, and cash accounts like checking. Doing anything other than that means I were fooling myself by looking only at a single account that has a fortuitous high return at the moment.