It's good to see a long-term stock market bear concede that stocks are not overpriced. By Jeremy J. Siegel, Contributing Columnist From Kiplinger's Personal Finance, August 2014 Over the years, I have frequently clashed with Pimco founder Bill Gross about his bearish comments regarding the stock market. Gross writes monthly commentaries that generate considerable buzz in the investment community. In September 2002, almost at the bottom of the bear market that followed the tech bubble, Gross posted a shocking column entitled “Dow 5000.” “Stocks stink and will continue to do so until they’re priced appropriately … around Dow 5000,” wrote Gross, or about 3,000 points below the Dow’s level at the time. A few weeks later, the Dow Jones industrial average bottomed at 7286, and the index nearly doubled over the next five years. Sponsored Content See Also: Next Rise in Interest Rates Will Come in 2015 Ten years later, in August 2012, with the Dow at 12,000, Gross wrote an article entitled “Cult Figures.” In that piece, he asserted that the “cult of equity” was dying, and he singled me out as its major booster. My research had calculated a long-term real return (after inflation) for U.S. stocks of 6.6% a year. But Gross claimed that was a “historical freak, a mutation likely never to be seen again,” and asserted that stock investors were in for a major disappointment. Instead, the market sprinted up another 4,000 points. Advertisement No bubbles. Given Gross’s long-term antipathy to stocks, I was floored when I read his May 2014 newsletter. As the Dow was flirting with 17,000, or 5,000 points higher than the level at which he had pronounced that equities were dying, Gross wrote that in the new environment of low interest rates, assets such as stocks and real estate are fairly priced and that “current fears of asset bubbles would be unfounded.” Furthermore, investors could adjust to the low-interest-rate environment by investing in “a higher proportion of stocks versus bonds.” What a turnaround! A bit longer than a decade after Gross declared that Dow 5000 was the right level for stocks, he now claimed the market was fairly priced at Dow 17,000. Gross’s new view of stocks stems from his current view of financial markets, which he calls the “new neutral.” The term neutral is used by central banks to describe an interest-rate environment that encourages neither expansion nor contraction. In their quarterly economic forecasts, Federal Reserve policymakers have been projecting a long-term neutral federal funds rate (the interest rate at which banks lend excess reserves to each other) of about 4%. But both Gross and I believe that the neutral rate is closer to 2%. As I explained in my previous column, lower rates are a consequence of slower growth and lower inflation. Gross and I agree that lower rates should raise the valuation of assets such as stocks, bonds and real estate. But this is where our agreement ends. I disagree with Gross’s expectations for stock returns, which he puts at only 4% before inflation. Although the bond market has adjusted to the “new neutral,” the stock market has not. The stock market’s current price-earnings ratio, at 16 times estimated 2014 earnings, is very near its historical average. That means stocks should nearly match their long-term real return of 6.6% annually. If we add the 2% that the Fed has targeted for the long-term inflation rate, that corresponds to a return in excess of 8%. Advertisement It’s good to see a long-term stock market bear like Bill Gross concede that stocks are not overpriced at today’s levels (although that in itself could be a bearish indicator). But he is still far too pessimistic about stocks’ future returns. Even if future corporate earnings do not rise any faster than inflation, the returns on stocks will swamp returns on fixed-income assets over the next decade. The “new neutral” doesn’t just mean that stocks are fairly priced. They’re actually undervalued if, as I expect, interest rates remain below 4%.