Shares can tumble for many reasons, and executives might be blamed for losses that are not really their fault.

ECONOMIST: Corporate crime

Remember all those newly-minted Double Dippers coming out of the woodwork in August of 2010 after a rough and tumble headline summer for stocks?

FORBES: If Every Bull Is Expecting a Pullback, Will There Be One?

The closest you get to a Barca villain is midfield enforcer Sergio Busquets or wingback Dani Alves, both of whom have a penchant for taking a tumble to win a free kick, while Busquets is known for the odd dirty tackle.

WSJ: The Backlash Against Barcelona