Robert Shiller, Yale professor and Nobel prize winner, is “definitely concerned” about the valuation of stocks which are trading at historic highs. Using his CAPE (cyclically adjusted price-to-earnings ratio) model, stocks are trading at 26x multiple which is well above its long-term average of 17. Shiller points out that the CAPE level has only been higher 3 previous times: 1929, 2000 and 2007. That sure sounds like a dire warning of a huge market drop. But is it?