The following is an excerpt from my forward for the incredible new book The Index Revolution by Rebalance Investment Committee member, and my colleague, Charley Ellis.

As a person who has believed in indexing all my life, I am delighted to add my voice in support of the important message of this book. The Index Revolution is not only a history of the growth of indexing over the past 40 years, but also a call to those who may have been slow to accept this revolutionary method of portfolio management. If you are still attracted to high-expense, actively managed mutual funds (or, worse, if you have chosen to invest in hedge funds), Charley Ellis’s succinct arguments as well as his marvelous anecdotes should leave no lingering doubts in your mind: index investing represents a superior investment strategy, and everyone should use index funds as the core of their investment portfolios.

Every year, mutual-fund advertisements proudly declare that “this year will be a stock-pickers’ market.” They may admit that during the previous year it was all right to be invested in a simple index fund, but they say that the value of professional investment management will become apparent in the current year. Barron’s ran a cover story in 2015 and made the same case in 2016 that “active” portfolio managers would “recapture their lost glory.” In early 2014 The Wall Street Journal ran an article predicting that 2014 would be a stock-pickers’ market. Money managers have a number of clichés they use to promote their high-priced services, and “stock-pickers’ market” is one of their favorites. But year after year, when the results come in, low-cost index funds prove their worth as the optimal way to invest.

Indexing outperforms in both bull and bear markets. Active management will not protect you by moving out of stocks when markets decline. No one can consistently time the market. There is no evidence to support the claim that active managers do better when there is more or less dispersion in the returns for individual stocks. Nor is it the case that indexing does worse during periods of rising interest rates. While in every year there will always be some actively managed funds that beat the market, the odds of your finding one are stacked against you. And there is little persistence in mutual fund returns. The fact that a fund is an outperformer in one year is no guarantee that it will be a winner in the next. Indeed, Morningstar, the mutual fund rating company, found that its ratings, based on past performance, were not useful in predicting future returns. Their five-star-rated funds, the top performers, actually did worse over the next year than the lowest one-star-rated Morningstar Funds.

Morningstar found that the only variable that was reliably correlated with the next year’s performance was the fund’s expense ratio. Funds with low expense ratios and low turnover tend to outperform funds with high turnover and high expenses (even before considering the adverse tax effects of high-turnover funds). Of course, the quintessential low-turnover, low-expense funds are index funds, which simply buy and hold all the stocks in a particular market and do not trade from stock to stock.

Standard & Poor’s Dow Jones Indices published a statistical analysis in 2016 detailing the dismal record of “active” portfolio managers: As is typically the case, about two-thirds of active large-capitalization managers underperformed the S&P 500 large-cap index during 2015. Nor were managers any better in the supposedly less efficient, small-capitalization universe. Almost three-quarters of small-cap managers underperformed the S&P Small-Cap Index. When S&P measured performance over a longer time period, the results got worse. Over 80 percent of large-cap managers and almost 90 percent of small-cap managers underperformed their benchmark indexes over a ten-year period through December 2015.

The same findings have been documented in international markets. Even in the less efficient emerging markets, index funds regularly outperform active funds. The very inefficiency of emerging markets (including large bid-asked spreads, market impact costs, and a variety of stamp taxes on transactions) makes the strategy of simply buying and holding a broad indexed portfolio an optimal strategy in these markets too. And indexing has proved its merit in the bond markets as well. The high-yield bond market is often considered to be best accessed via active investing, as passive vehicles have structural constraints that limit their flexibility and ability to deal with credit risk. Nevertheless, Standard & Poor’s found that the ten-year results through 2015 for the actively managed high-yield funds category show that over 90 percent of funds underperformed their broad-based benchmarks.

It is true that in every period there are some managers who do outperform. But there is little consistency. The best managers in one period are usually not the same as the outperformers in the next. And even celebrity managers like William Miller, who racked up market-beating returns over a decade, underperformed over the next several years. Your chances of picking the best managers for the next decade are virtually nil. You are far more likely to end up with a typical underperforming, high-priced manager who will produce returns for you that are lower than index returns by an amount about equal to the difference in the fees that are charged. Buying a low-cost index fund or exchange-traded fund (ETF) is the superior investment strategy. Trying to predict the next star manager is, in Charley Ellis’s famous words, “a loser’s game.”

Do you want more proof? In this slim volume, Charley presents a compendium of dismal results showing the futility of trying to beat the market. He also presents a number of additional arguments for indexing such as its simplicity and tax efficiency. And if you don’t believe me or even Charley, remember that Warren Buffett, perhaps the greatest investor of our time, has opined that all investors would be better off if their portfolio contained a diversified group of index funds.

In this readable volume, Charley describes how indexing was originally thought to be an inferior way to invest and even “un-American.” But as time went on and the evidence became stronger and stronger, the case for indexing became air tight. Indeed, the Ellis thesis, brilliantly explained in these pages, is that changes in the structure of the stock market now make it virtually impossible for money managers to outperform the market. Perhaps 50 years ago when our stock markets were dominated by individual investors, professionals, who visited companies to talk with management and were the first to know about company prospects, might have been able to select the best stocks and beat the market. But now we have fair disclosure regulations that require companies to make public announcements of any material facts that could influence their share price. And perhaps 98 percent of the trading is done by professionals with equally superb information and technology rather than by individuals. The irony is that in such an environment it is increasingly difficult for any professional to beat the market by enough to cover the extra fees and costs involved in trying.

The Index Revolution is not only a historical explanation of the growing acceptance of indexing over the past 50 years, but also an account of the personal evolution of a former believer in active management. Charley Ellis began his career as a firm believer in the usefulness of traditional security analysis and the potential superiority of professional management of common stock portfolios. He founded the firm Greenwich Associates that provides advisory services to the financial industry, and particularly to major investment managers. As a firsthand participant in the growth of the industry, Charley was in the perfect position to understand how vast changes in the environment made the traditional services of active portfolio managers increasingly less effective.

The paradox of security analysis and active stock selection is that as their practitioners become more professional and skilled, markets become more efficient and the search for mispriced securities becomes increasingly more difficult. Whenever information now becomes available about an industry or an individual stock, it gets reflected in the prices of individual stocks without delay. That does not mean that prices are always “correct.” Indeed, we know after the fact that prices are frequently “wrong.” But at any point in time, no one knows for sure whether they are too high or too low. And betting against the collective wisdom of many thousands of professional market participants is likely to be a “loser’s game.” Correct perceptions of mispricing are no more likely than incorrect perceptions, and active management adds considerable costs to the process as well as being extremely tax inefficient for taxable investors.

When Vanguard launched the first index, its chairman, John Bogle, hoped to raise $150 million in the fund’s initial public offering. In fact, only $11.4 million was raised, and the new fund was called “Bogle’s Folly.” The fund grew only slowly over the next several years and was denigrated by professional investment advisers and dismissed as “settling for mediocrity.” But experience was the best teacher. Investors came to realize that index investing was superior investing, and index funds with their low fees regularly outperformed actively managed funds. And index funds grew steadily over time.

Today, indexed mutual funds have over $2 trillion of investment assets. And Exchange Traded (Index) Funds have approximately the same amount of assets. According to Morningstar, during 2015 investors pulled over $200 billion out of actively managed funds while they were pouring over $400 billion into index funds. These shifts are the latest evidence of a sea change in the asset management business. The index revolution is real, and the winners are individual and institutional investors who understand the superiority of indexing.

While indexing has grown sharply over the years, it still represents only about 30 percent of the total investment dollars. So the revolution still has lots of room to grow. Why so many investors continue to pay for expensive portfolio management advice of questionable value is testimony to the power of hope over experience. But, as Albert Einstein has taught us, “Insanity (is) doing the same thing over and over again and expecting different results.”

It is very clear that the core of every investment portfolio and certainly the composition of every retirement portfolio should be invested in low-cost index funds. If you are not convinced, and if you would like an expert like Charley Ellis to convince you that indexing is the optimal investment strategy, read this wonderful little book. It will be the most financially rewarding two hours you could possibly spend.


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