Bubble talk is a hardy perennial. The latest installment comes in a recent column by Jason Zweig, who provocatively inquires: "Can you spot a bubble?"
It's a loaded question, of course. If the answer is "no," well, then you're a chump. If it's "yes," then the natural follow-up is to ask how you've profited by spotting bubbles? Did you sell in late-2007/early 2008? Did you then jump back in at some point in, say, January 2009?
