Major indexes all over the world have suffered some of their steepest losses since the financial crisis over the past week. Smart investors, however, should sit tight.

Inevitable market corrections can be great opportunities. Learn how on today's Industry Focus, financials edition.

Over 30 million users from the popular online dating site have had their information leaked after Ashley Madison was hit by a cyberattack. Given the nature of the site’s business, its data breach has been widely reported on, but how does it compare to some of the biggest corporate data breaches in history and how can other companies prevent it from happening to them?

This week we dip into the mailbag to answer questions from our listeners; covering topics from natural gas vehicles, oil services sustainability, and sinking solar stocks.

Motley Fool's Kristine Harjes and contributor Todd Campbell discuss second quarter earnings winners and losers.