Why is it that in a lot of literature, and on TV, 10-15% returns are heralded as such a great accomplishment? CNBC and other networks herald fund managers returning 10-15% as best of breed. But lots of daytraders and others are returning 200, 300, sometimes 400% annualy.. Is it because fund managers have millions of dollars and daytrading doesn't scale? What's the deal here. How are daytraders able to double their profits while professional fund managers with tons of resources and huge teams of analysts are unable to match?