It's the end of June and you've outdone yourselves again! Our mailbag is full and we've got a packed show. Today David tackles how to build a new portfolio from scratch, considers whether to sell or add to losers, and attempts to solve an ancient, riddle that left Plato pondering. All that and more on this week's mailbag. Thanks to Harry's for supporting The Motley Fool. Get your Free Trial — go to Harrys.com/fool

Let's face it, the stock market has been a raging bull for a long time now. It can't go on forever, right? It might even crash, and hard! So, what's a Rule Breaker to do? Pick 5 stocks that are hitting all-time highs, of course! Because great companies are worth owning. Because today's highs will be tomorrow's memories. And, well, because that's just the way we roll.

By now you have heard the news of the shooting at a Congressional baseball practice here in Alexandria, just a few blocks from us here at Fool HQ. In response, David urges us to maintain independent thinking, civility, a motley influence, and the humility that is the core of Foolishness.

Are you concerned by the “market drop” we experienced over the last few days? If you’re a Rule Breaking Investor, chances are it hit you pretty hard, and that can be painful. But if you’re a Rule Breaking Investor, chances are you’re also going to be holding some of the best companies for a decade or more, and that is sure to cheer you up. As David has said before, and will say again, “Stocks always go down faster than they go up, but they always go up more than they go down.”

You may not yet be familiar with Zack Kanter, but the self-described entrepreneur, speaker, futurist, writer, amateur chef, and all-around nerd is someone you should get to know if you’re curious about the future. Today Zack is here to talk with David about why Ford and Geico should fear the autonomous car, how an entrepreneur like you could improve the news, and Amazon’s path to becoming the world’s most valuable company.

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