Flexionism is Timeless, from Victor Niederhoffer
It is interesting for me to see that my article with Lorie from 48 years ago showing that insider buying by 3 or more insiders in 1 month leads to superior performance has apparently held up for more than 60 years. Seyhun seems to have made a career of this and there are funds that trade based on this anomaly. And apparently, as we know, insider trading is increasing. Flexionism is timeless.