The BHB model rewards investors who overweight positively performing sectors, while the BF only does so if the sector outperforms the benchmark. When discussing this in our training classes, I explain that if all the sectors are positive, BHB would want the investor to overweight them all!
The WSJ today reported that all 10 stock sectors of the S&P 500 will, in fact, have positive gains for this year ("All 10 Stock Sectors Post Gains in Big Year." Dan Strumpf Page C4).
Thus, we have a perfect example to draw upon to demonstrate the superiority of the older (by only one year) model, which Gary Brinson crafted with Nimrod Fachler.