Investors have too often extrapolated from recent experience. In the 1950s, who but the most rampant optimist would have dreamt that over the next fifty years the real return on equities would be 9% per year? Yet this is what happened in the U.S. stock market. The optimists triumphed. However, as Don Marquis observed, an optimist is someone who never had much experience. The authors of this book extend our experience across regions and across time. They present a comprehensive and consistent analysis of investment returns for equities, bonds, bills, currencies and inflation, spanning sixteen countries, from the end of the nineteenth century to the beginning of the twenty-first. This is achieved in a clear and simple way, with over 130 color diagrams that make comparison easy. Crucially, the authors analyze total returns, including reinvested income. They show that some historical indexes overstate long-term performance because they are contaminated by survivorship bias and...