A common problem that all of us have is that we believe ourselves to be able to produce superior results in virtually any area we try -- acting on that belief can cost you a fortune if it affects how you invest over your lifetime. By definition, half will be average or less, and half average or higher in most areas of human endeavor. When it comes to investing, however, the odds are not that good.
If you choose the wrong asset class, you can make great choices and greatly lag the pack. If you choose the wrong way to invest with the right asset class, you can still do poorly.
Mr. Bogle's book explains in remarkable detail (with lots of graphs and numbers to make the point) that almost everyone will lag the market averages for stocks over any multiple year period of time due to the effects of trading stocks, taxes, costs for money management, marketing expenses, and size of portfolio.
Rather than despair, he points out that we can view this as an outstanding opportunity. We can simply buy indexed mutual funds (such as the ones that Vanguard, his former firm, offers) and outperform 98-99 percent of everyone who invests for the long haul.
Unlike other books where the author touts an activity that benefits him economically, Mr. Bogle's arguement is right. For anyone with less investment skill than Warren Buffett, S&P 500 and Wilshire 5000 index funds will be a terrific solution.
New investors may find this book to have more information than they need or can easily absorb.
People who think they know all the answers will find a lot of new material to cogitate about, usefully.
Anyone who owns mutual funds is making a mistake if they do not read this book.
Anytime you start to invest on the assumption that you can beat the market easily, PLEASE QUICKLY READ OR REREAD THIS BOOK. THEN LIE DOWN UNTIL THE FEELING GOES AWAY!
He is also remarkably candid that future returns from indexing may be modest (even though you will continue to beat almost everyone else). My own reaction is that the market is really too high now to start index investing in many countries, but new cash should certainly go into index mutual funds in other countries whenever we get a decent correction down to or much closer to the more typical 14 times p/e that stocks usually sell for. Mr. Bogle also explores that point in excellent detail.
A wonderful book by someone who is really looking out for the investors' best interests!