So what should that be?

So what should that be? The compound annual rate of return
for stocks from 1946 through 2006 is 11.5 percent, with the after-
inflation or real return at 7.2 percent. So investors may be
faced not with just half the returns from the 1990s stock bubble,
but less than half.
Another reason for thinking stock market returns will be
lower is the valuation of the equity market. Stocks in the closely
watched S&P 500 stock index are still a little expensive historically,
even after the collapse that began in 2000.