More and more stocks are traded by computers, at speeds so fast humans can't keep up. The problems this creates are largely the problems created by all trading, just speeded up.

They're traveling money salesmen. This explains why many of them are so ornery so much of the time.

The losses only came to light after former trader Kweku Adoboli told his bosses what he'd done, causing more than $2 billion dollars in losses and exposing UBS to as much as $12 billion in possible losses.

Voters in Washington and Colorado just approved measures legalizing marijuana for recreational use. But businesses that want to sell marijuana in those states will face a problem: No bank wants to do business with them.