Goldman is dealing with some upset clients after its overvaluation call on the S&P 500 last week.
"Most client responses attempted to justify personal expectations for continued multiple expansion in 2014 ... The low interest rate backdrop was the most common client justification for continued P/E expansion." Goldman, however, looks at P/E's vs. real rates over time and finds today's pricey no matter the rate environment.
"Many on the buy-side expect price gains of 10% to 20% this year ... the fact remains that market has rarely traded at a higher P/E outside of the tech bubble, or coming out of recessions when EPS were extremely low."