I wanted to start today with a few pointers on how to handle a “good” problem that many investors are experiencing right now: What to do with a stock that, soon after your buy, has zoomed 20% or more in just two or three weeks. Paradoxically, it’s these types of situations that cause the most stress and uncertainty. Profits are good to have, but if a stock goes vertical, you’re left wondering how to properly manage your good fortune. The prospect of making a decision–either sitting tight or selling–can cause investors to behave irrationally. The solution, as usual, is...