Shown in the graphic below are the six primary mental and emotional biases investors suffer. Which cause them to experience worse returns than unmanaged indices. Wall Street & the financial media primarily exploit these biases rather than curing them.
Personally, I think the most destructive is the 5th one, a preference for Lotteries. Just look at the billions that flow into national & local government sanctioned lotteries, for example. Like any other bias-subject commodity on the market, this bias causes lotteries to be way over-valued.
Your Constructive Comments are Welcome!