The Little Book of Common Sense Investing is the classic guide to getting smart about the market. Legendary mutual fund pioneer John C. Bogle reveals his key to getting more out of investing: low-cost index funds. Bogle describes the simplest and most effective investment strategy for building wealth over the long term: buy and hold, at very low cost, a mutual fund that tracks a broad stock market Index such as the S&P 500. While the stock market has tumbled and then soared since the first edition of Little Book of Common Sense was published in April 2007, Bogle's investment principles have endured and served investors well. This tenth anniversary edition includes updated data and new information but maintains the same long-term perspective as in its predecessor. Bogle has also added two new chapters designed to provide further guidance to investors: one on asset allocation, the other on retirement investing. A portfolio focused on index funds is the only investment that effectively guarantees your fair share of stock market returns. Bogle shows you how to make index investing work for you and help you achieve your financial goals, and finds support from some of the world's best financial minds, including Warren Buffett, Benjamin Graham, Paul Samuelson, Burton Malkiel, Yale's David Swensen, Cliff Asness of AQR, and many others.