That is an interesting question, that I posed to myself a few days ago. What I rely on is dividend yield on the total stock market (US). Take a look at the chart below. As one can see, the market is a bit high, but not in bubble territory. If the yield drops down near 1.5% yield, then I would be more concerned. Anyway, I voted "not very concerned." The charts you use, and in particular the one projecting trends, to me is GIGO, and not helpful.
Oh, come to think of it, I am going to move this thread to the economics board.
Poll
