For many years, investors have attempted to diversify their overall portfolios by trying to pick stocks across a diverse set of asset classes. Which is all well and good, but the problem it generally runs into is you should also be diversified within any given asset class, lest something adverse happen to the company you happened to bet on. Yet as soon as your diversifying both within, and between asset classes, now your running a portfolio of potentially 40+ equities, and even the active investor rarely has time to do due diligence on the hundreds of companies required to find 40 excellent investments.

ETF. The latest all important acronym to add to your vocabulary. ETF stands for exchange traded fund; a relatively recent innovation that allows investors to directly target sectors for investment, instead of picking individual stocks, and praying those stocks wont underperform their sector. ETFs are similar to mutual funds, with a couple important differences. They can be bought and sold like a stock, no minimum investment or redemption fees, and you can short them.

Each ETF is designed to mimic an investment in a certain industry, region, or type of stock. Some examples of ETFs are the XLI, XLU, and EWC. These ETFs grant an investor exposure to the industrial sector of the S&P 500, the utilities sector of the S&P 500, and the entire Canadian stock market, respectively. Similarly, one who simply wanted to match the S&P 500 indexs returns could just invest in the SPY.

But why shun the mutual fund? Why take the new guy over the established king? Lets start with the tax advantage. When mutual funds endure large sell offs, they have to liquidate many positions, some of which are currently at a gain. They then have to pay capital gains on those positions, and this negatively impacts their return. It would be an understatement to say that Mutual funds generally have higher expense ratios in general compared to ETFs. It can sometimes cost as little as 8 dollars to get into an ETF whereas a mutual fund of 20,000 that grows to 60,000 over a 20 year period may have conservatively lost as much as 18,000 to its competent managers.

Of course, the vast convenience ETFs have over mutual funds shouldn’t be underestimated. ETFs can be traded just like a stock, giving active traders the ability to buy and sell intraday. The ability to short was impossible with a mutual fund, but now it can be done. During any bear market, the ability to benefit from the fall of sectors as well as their rise is a valuable one to have.

Furthermore, ETFs are often optionable, so risk can be minimized with covered calls and protective puts, or ” if your so inclined ” much larger returns can be sought through buying calls and puts on the ETF. Experienced stock option experts may even use advanced stock option strategies, like iron condors and vertical spreads to increase investment returns.

There are some disadvantages to ETFs as well. Some ETFs have complex structures that can lead them to deviate from what they are supposed to be tracking. A similar instrument, ETNs, can also easily be mistaken for an ETF, leading to some general confusion about what exactly you are investing in. Yet for those willing to put in the work to learn, ETFs can be a highly profitable venture for the modern day portfolio.

ETFs are a powerful tool for both the intelligent investor, and the active trader. Their ability to hone in and diversify within a given industry, or region of the world is invaluable when riding the larger megatrends that happen periodically in investment. Similarly, the ability to trade them just like a stock, using techniques such as shorting, options, and the various order types make them an invaluable asset for the active trader. For those believing the efficient market hypothesis, they even allow passive index investing at a cost far below that of a mutual fund.