"GOLDMAN SACHS: STOCKS 30%-45% OVER-PRICED "

Stocks can solve over-valuation by correcting in price or correcting in time.
They can also go higher.
From ZeroHedge:

Did Goldman Just Kill The Music? - "The S&P500 Is Now Overvalued By Almost Any Measure"

"As long as the music is playing, you've got to get up and dance.... We’re still dancing."

      - Chuck Prince, July 2007

Late last night the music may have just skipped a major beat after Goldman released a Friday evening note that is perhaps the most bearish thing to come out of Goldman's chief strategist David Kostin in over a year, (and who incidentally just repeated what we said most recently a week ago in "Stocks Are More Expensive Now Than At Their 2007 Peak").
To wit:

S&P 500 valuation is lofty by almost any measure, both for the aggregate market (15.9x) as well as the median stock (16.8x). We believe S&P 500 trades close to fair value and the forward path will depend on profit growth rather than P/E expansion. However, many clients argue that the P/E multiple will continue to rise in 2014 with 17x or 18x often cited, with some investors arguing for 20x. We explore valuation using various approaches. We conclude that further P/E expansion will be difficult to achieve. Of course, it is possible. It is just not probable based on history. 

The current valuation of the S&P 500 is lofty by almost any measure, both for the aggregate market as well as the median stock: (1) The P/E ratio; (2) the current P/E expansion cycle; (3) EV/Sales; (4) EV/EBITDA; (5) Free Cash Flow yield; (6) Price/Book as well as the ROE and P/B relationship; and compared with the levels of (6) inflation; (7) nominal 10-year Treasury yields; and (8) real interest rates. Furthermore, the cyclically-adjusted P/E ratio suggests the S&P 500 is currently 30% overvalued in terms of (9) Operating EPS and (10) about 45% overvalued using As Reported earnings.

Cue David Tepper to bring out even bigger greater fools who do believe in his 20x PE multiple "thesis." Cause if 20x works, why not 40x, or 60x, or moar?
* * *
Kostin's full "market is now overvalued" note:

We believe S&P 500 currently trades close to fair value and the forward path of the market will depend on the trajectory of profits rather than further expansion of the forward P/E multiple from the current 15.9x. We forecast a modest price gain of roughly 3% to our year-end 2014 target of 1900. We expect S&P 500 will climb to 2100 by the end of 2015 and reach 2200 by the end of 2016 representing a gain of 20% over the next three years....MUCH MORE

Just three days ago, in "The Muppets Take Wall Street? Equity Funds Get Record $352 Billion Inflow", I opined that the public had not taken enough stock off the hands of those who were buying in March 2009 to trigger a full scale sell off. Or, as a market genius put it:

"I can distribute more stock on upticks than I can on down"
-E.H. Harriman, railroad man and Wall Street pro.