Should you buy in thirds or set limit orders? What's the big deal about Pokemon Go? Why would anyone ever own a bond with a negative interest rate? And why isn't The Motley Fool a public company? All this and more in this month's mailbag!

State lotteries, disclaimers, and soaps that don’t lather… From the sublime to the ridiculous, David shares his list of pet peeves.

Five companies that we like over the next 3 years - all inspired by The United Kingdom's recent move to withdraw from the European Union.  

Motley Fool CAPS (caps.fool.com) is a free service you can use to test your stock-picking prowess. You don’t have to risk any money in the market, but you will be scored for your performance. At the age of 8, David’s son Zack started picking stocks on CAPS, and now, nine years later, you may be surprised by how well he did. Today, a teenaged Zack is in the studio to review those picks, his reasons for making them, and the lessons learned growing up with a Rule-Breaking dad.