A daily double courtesy of IU’s Dave Nadig

ETFs can be more efficient than the stocks they track, even in surprising places.

At almost every conference and ETFs 101 webinar we do, you’ll hear us saying again and again that spreads matter.

In fact, getting investors to understand the importance of spreads, depth of book, and limit orders make up the bulk of the live trading sessions we do.

After all, next to expense ratios, the spreads and commissions you pay on your ETF trades are one of the only things knowable in advance and, depending on your time horizon, they can have a real impact on your performance.

One of the maxims we always put out there, almost as an oddity, is that ETFs can often be more efficient than the stocks they’re composed of. We usually pull a chart of an extreme case to prove the point: an enormously liquid ETF, like the iShares Emerging Markets ETF (NYSEArca: EEM) and its comparatively wide-spread and thinly traded stocks—thinly traded by New York Stock Exchange standards, anyway.

When it came time to update the chart, however, I took a different approach.

Instead of hunting for illiquid underlying stocks and super-liquid ETFs, I went for the opposite. I cast around for an example of an ETF with thin volume, where the portfolio was small enough so that most investors could, if they wanted, just buy all the stocks themselves. Surely in such a case, the spreads of the liquid stocks would beat the spreads of the illiquid ETF, right?

Software was the perfect place to look, and IGV was our poster child. IGV is the iShares S&P North American Technology-Software Index Fund (NYSEArca: IGV). It holds 54 stocks, including some of the most liquid companies in the world, like Microsoft and Oracle. IGV, however, is a wee bit less liquid, trading less than 50,000 shares on an average day.

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