Believe it or not, when it comes to investing, I’m not a big reader of news and opinion pieces–I prefer to listen to the market itself. I usually check the headlines but that’s about it. (Company-specific news is different; I do check the news on all my stocks each day, just to know what’s going on.) But I couldn’t help noticing when, on a major news Web site the other day, I saw the headline “Once-trendy crocs could be on last legs,” with a subtitle that read “100 million foam clogs were sold in 7 years, but the firm...