A Fanatic Is One Who Won't Change Mind or the Subject

In his latest whitepaper, Rob Arnott is still repeating things like this: “We point out that some of these factors owe much (or all) of their past efficacy to rising relative valuations.” It's not a minor assertion but one of his central themes. It was the main topic of the first major paper in his recent wave of “most of the factors are overpriced, data mined, and doomed, save only for the value factor which I still occasionally rename and claim as my own” series, and he returns to it here.