This is the last question in the series. Please feel free to post any other investing questions you have and we’ll be happy to answer them. Question: In a prior Cabot Wealth Advisory, you wrote that commodity stocks were dead, and should be sold. How did you see that coming? And what do you think of them now? (Editor’s Note: This refers to the July 10, 2008 issue.) Answer: One key sell rule you can use is this: If a stock or group has had an extended run-up during the past two, three or more months, and then most...