The Dow has now gained ground in each of the past seven weeks. The last time it did that was back in the week ending April 23, 2010. Ahem. A month later, it was down 1,200 points. You see, nothing lasts forever, not even a speculative bounce. The Shiller cyclically-adjusted P/E ratio has expanded for six months in a row and at 23.3x in January is now at its highest level in nearly three years. Sentiment is wildly bullish. The market is seriously overbought, and it is expensive on a “normalized” earnings basis.