My, how index funds have grown since the first one launched almost 35 years ago.
This month, Bogle's Folly celebrates its 35th birthday.
For those unfamiliar with the history of index funds, Bogle's Folly is the Vanguard 500
Now index funds are right up there with mom, baseball, and apple pie. At the end of June, there were nearly 290 distinct stock and bond index mutual funds in the United States and 990 U.S.-based passive exchange-traded funds with nearly $2.3 trillion in assets. That's still less than a third of the $7.3 trillion in actively managed funds, but passive investing inexorably continues to gain ground. For the year ended June 2011, long-term passive funds and ETFs took in more than $183 billion in new inflows, while actively managed funds garnered nearly $138 billion. Broadly diversified index funds' market share increased to 22.3% in May 2011 from 20.7% a year earlier, while active funds' portion dropped from 77.8% to 76.1%.
Onward, Passive Soldiers
Despite predictions to the contrary, more often than not settling for an index fund has led to above-average returns. More than half of U.S.-domiciled index funds, including those that have been liquidated or merged away over the years, finished in the top two quartiles of their respective categories in the one-, three-, five-, 10-, and 15-year time frames ended July 31, 2011.
Index funds may not have anything to prove anymore, but new challenges have come with their success. A lot of suspect investments and strategies are trying to ride the coattails of the indexing movement. Particularly among ETFs, there's been a profusion of narrowly focused, more-expensive niche index funds tracking obscure asset-class slices such as corn, Andean companies, lithium miners, and battery makers. In the past decade, even Vanguard, a bastion of broad-based indexing, has launched sector index funds and ETFs, albeit more-diversified ones than other ETF sellers have introduced. There's also been an explosion of leveraged index funds and ETFs that promise to produce 2 times the return or the inverse of their benchmarks. Their purveyors pitch these products as tools for active index investing--an approach that can involve trying to beat the market by tactically trading chunks of it, which is hard to make work over the long term.
These funds and approaches stretch the founding principles of indexing--buying and holding a broadly diversified basket of securities at low cost--to the breaking point. When they burn unwitting investors who buy them without understanding them or who unsuccessfully use them to make short-term market calls, they besmirch the good name indexing took four decades to build.
Indexing success also has attracted rivals trying to improve on traditional passive investing approaches. There has been a proliferation of indexes that weight their constituents by measures other than market capitalization--the standard construction methodology for four decades. Most prominent among them are the fundamentally weighted indexes developed by Robert Arnott's Research Affiliates. These benchmarks rank their constituents by book value, dividends, sales, and cash flow instead of market value and are tracked by several funds and ETFs, such as PowerShares FTSE RAFI US 1000 Index
'Tis a Gift to Be Simple
The firm that popularized indexing hasn't adopted fundamental weighting and likely won't. In a recent interview with Morningstar Advisor magazine, Vanguard chairman and CEO Bill McNabb contended weighting indexes by dividends or other factors "are just that, factor bets" that ultimately could disappoint investors when growth and large-cap stocks outperform.