Financier Baron Rothschild famously said, "The time to buy is when there's blood in the streets." What he meant is that the largest profits are made when traders purchase shares in companies whose share price has been beaten down so far that most investors have lost all interest. It's at this point that spectacular turnarounds can happen.

Today, one industry in particular has come under fire. Extreme regulatory pressure, public outcry, massive defaults, and even having its financial lifeline threatened have caused investors to flee the sector in droves.