Is Shiller's CAPE Useless?

One of the hallmarks of very late stage bull market cycles is the inevitable bashing of long-term valuation metrics. In the late 90's if you were buying shares of Berkshire Hathaway stock it was mocked as “driving Dad's old Pontiac.” In 2007, valuation metrics were being dismissed because the markets were flush with liquidity, interest rates were low and “Subprime was contained.”