12/2/2010 2:15 PM ET|
Index funds becoming harder to beat?
Passively managed portfolios that aim to match, not beat, the performance of the broader market are being tweaked to make investing cheaper and easier.
Financial markets are reeling in Europe, another insider-trading scandal is unfolding on Wall Street and the Federal Reserve's efforts to drive down interest rates seem to be backfiring. Even so, the Standard & Poor's 500 Index ($INX) is up about 5% thus far this year.
More important for the future, index funds continue to make investing cheaper and easier than ever. For investors in these low-cost, autopilot portfolios that dispense with stock pickers and passively replicate the holdings of a broad basket of stocks or bonds, the best is yet to be.
That may not sound right at first. Because they aren't designed to beat the market, but only to match it, these portfolios don't look very appealing after a long period in which stocks have gone nowhere. In a market with low returns, low fees still can't leave you with much.
Over the past decade, Vanguard Total Stock Market Index (VTSMX) has gained an annual average of just 1.79%, or less than half the return you could have gotten keeping your money in cash. Then again, according to Morningstar, this autopilot fund outperformed two-thirds of all other stock funds, including those run by managers trying to beat the market.
Until now, index funds have had an Achilles' heel. One factor that makes indexing "a horrendous idea," the renowned value investor Seth Klarman of Baupost Group argued earlier this year, is that hedge funds and others have long beaten the index funds to the punch on trades that the autopilot portfolios are forced to make.
New "investable" indexes, forthcoming early next year from the Center for Research in Security Prices at the University of Chicago, could reduce compulsory trading for any index funds that adopt them as a benchmark. Funds that trade less should have lower brokerage costs, lower tax bills and higher net returns.
Better yet, it should be harder for outsiders to "front run" these improved indexes. CRSP, founded in 1960, was a pioneer in calculating long-term returns on assets; it gathers and analyzes massive amounts of data for investment firms and academic researchers.
Consider an index fund that specializes in small stocks. If the shares of a little company in the fund take off, then the stock won't be small anymore -- and the fund will have to sell it. Likewise, the companies that compile market benchmarks periodically add or delete stocks, forcing index funds to buy everything that is added and to sell everything that is deleted.
Each June, roughly 200 stocks are replaced in the Russell 2000 ($RUT.X) index of small companies. This June 25, the stocks that were added to the Russell 2000 outperformed those that were deleted by 2.3%, according to Investment Technology Group. Over the long run, sharp traders getting out in front of these forced portfolio changes have poached at least 0.38 percentage point of annual return away from Russell 2000 index funds, estimates a new study in the Journal of Empirical Finance.
CRSP's new family of indexes will tackle the poaching problem in several ways, says Lubos Pastor, a University of Chicago finance professor who helped design them. The boundaries between small, medium and large stocks will be set as proportions of the value of the total market, rather than as fixed dollar amounts or as an unchanging number of companies.
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