Don't sweat all the talk of gloom and doom; history proves that, in the long run, it doesn't pay to be a pessimist. By Jeremy J. Siegel, Contributing Columnist November 8, 2010 In August 1979, Business Week magazine ran a cover story entitled "The Death of Equities," in which it declared that inflation had permanently crippled stocks as an investment. "For better or for worse," Business Week asserted, the U.S. "probably has to regard the death of equities as a near-permanent condition -- reversible some day, but not soon."Yet just two months later, Paul Volcker, newly appointed chairman of the Federal Reserve, put the screws on inflation by sharply raising short-term interest rates and cutting back on growth of the money supply. The economy suffered two recessions in the next three years, but stocks held their value. In the summer of 1982, stocks kicked off the greatest bull market the world has ever seen. During the next 18 years, Standard & Poor's 500-stock index rose nearly 15-fold, or 19.9% per year, creating trillions of dollars in wealth for investors who owned stocks. Pessimism is as rampant today as it was in 1979 and, once again, it is misplaced. The specter of inflation has been replaced by fear of a trio of other dire prospects: deflation and financial collapse, the long and painful unwinding of an economy that has gorged on borrowed money, and the prospect of millions of baby-boomers selling their stocks to finance an increasingly bleak future. Last June, for example, the Royal Bank of Scotland declared that the world economy was at the "cliff-edge," and predicted that a dramatic economic collapse would "destroy the world's worst cult -- the cult of the equity, which has no basis in fact, or history." Then we have Pimco's Bill Gross, manager of the world's largest bond fund, who, with Pimco chief executive Mohamed El-Erian, coined the term "new normal" to describe an economy characterized by slow growth, weakened consumers and meager stock returns. Further adding to the gloom are statements by Harry Dent, who in 1993 wrote The Great Boom Ahead, a book with an optimistic stock-market outlook based on demographic changes. Now Dent predicts that the impending retirement of the baby-boom generation will lead to a massive economic and financial bust. Advertisement But all these doomsayers exhibit the same shortsightedness that Business Week did three decades earlier. The Royal Bank of Scotland's claim that the "cult of the equity" has "no basis in fact" is just plain wrong. I documented the remarkable long-term returns in the U.S. stock market in Stocks for the Long Run. In Triumph of the Optimists, three British researchers calculated returns on stocks, bonds and government securities in 16 countries over the past century. Their conclusion was unambiguous: Stock returns beat bonds in every country by a wide margin. Bill Gross's new normal is similarly shortsighted. Gross asserts that consumers, who account for the biggest chunk of economic growth, are burdened with debt and tapped out. As a result, he says, weak consumer spending will doom the economy to slow growth for many years. But long-term economic growth depends on productivity growth, not on the debt load of consumers. In fact, productivity growth has been accelerating over the past decade, averaging 2.7% per year, or 0.5 percentage point above its long-term average. In the past this growth has generated the income necessary to propel the economy forward, and it will do so again. Finally, predictions warning that the wave of baby-boomers entering retirement will lead to the liquidation of stocks and a collapse of values are similarly flawed. Emerging economies account for 85% of the world's population. My research has found that rising incomes in Asia and elsewhere can generate enough savings to absorb the boomers' asset sales without significantly depressing prices. History shows that pessimists, no matter how fashionable, have always been wrong about long-term prospects for the U.S. economy and the stock market. This time is no different. Columnist Jeremy J. Siegel is a professor at the University of Pennsylvania's Wharton School and the author of Stocks for the Long Run and The Future for Investors.