There is nothing like a bear market to boost the expected return from stocks. In The Little Book of Common Sense Investing (review), published last year, John Bogle projected an average annual return of 7 percent over the next ten years: 2 percent from dividends, 5 to 6 percent from earnings growth and a 1 percent loss due to the easing of P/E ratio from 18 to 16.

According to a column on the Fortune website, Mr. Bogle is a lot more optimistic today:

The upside of the painful bear market, of course, is that stocks are much cheaper – as cheap, in fact, as they have been in many, many years. Based on the price/earnings ratio (using earnings from the past 12 months), the U.S. market is as inexpensive today as it has been since 1990. From today’s levels, says Bogle, it’s reasonable to think that the S&P 500’s profits could grow by 7% a year. Throw in the current dividend yield of over 3%, and Bogle believes stocks could return 10% a year for the next decade. “I don’t think that’s a pipe dream,” he says – and this from a man who at the turn of the century was warning of years of subpar returns.

It’s a bit surprising that Mr. Bogle has increased the forecast for earnings growth to 7% from his previous estimate of 5% to 6% but such rates have been observed in the past: 7.4% in the 1990s and 9.9% in the 1940s and 1970s.