Taking The Gloves Off On The Discussion of Rational Investment Analysis (Part 9) Absolute Investing: Not An “Accredited Investor”? Build Your Own Hedge Fund With ETFs – Part 1
  • Posted by: IRON100, August 31st, 2010 at 4:00 pm
  • Comments: 0

IRON100

Thanks for coming back after the slight delay in publishing. Part 9 of my discussion on rational investment analysis deals with how "the rest of us" can compete with sloppy bearish domestic (U.S.) equity markets and the growing yet insanely volatile emerging and established world equity markets by building one's own hedge fund.  I decided the easiest and best explained example of such a strategy was written by Mark Gerstein who either is the creator of or at least a financial manager who uses the services of the Portfolio123 screener (available in both a free and a premium edition).  In his Seeking Alpha article, he discusses a couple of ways to build a portfolio of exchange traded funds (ETFs) that should benefit (through rebalancing periodically) from either an upward or downward move in the markets. StockTwits, nor I, am endorsing this particular piece of software (and there are quite a few like it or add-ons to stock databases that can do similar tasks).

Read the above article, but do not let it totally geek you out as some of the concepts are mathematical, but the interpretation of the math is more important than just calculating it. Most modern portfolio software (including the software above) can calculate key ratios for you.

The concept to which I want to introduce you is the process of portfolio rebalancing that is discussed in Unexpected Returns, Understanding Stock Market Cycles, by Ed Easterling. The idea of rebalancing a portfolio periodically is part of his "rowing" techniques for navigating the investment process during volatile or downward moving markets.

Typically, a portfolio is measured against the standard deviation in market price volatility, and a portfolio's returns are gauged against a risk-free return to truly understand how well the portfolio is being managed versus just buying and index. This kind of investment analysis is, in my view, critical to determining how well a portfolio is actually doing. One measure of performance is the Sharpe Ratio. The higher the Sharpe Ratio, the better the risk adjusted performance is. If the Sharpe Ratio is greater than 1, the returns versus risk-free returns are particularly positive when it comes to portfolio performance.  If the Sharpe Ratio is at or below zero, a risk-free asset (as calculated using the return of a 10-year Treasury bond) will perform better than the measured portfolio.

When it comes to hedge funds (even home-grown ones using ETFs), one has to understand that the Sharpe Ratio might not be enough to measure a portfolio's true performance. When one wants to measure the performance of upward and downward volatility (so as not to penalize a portfolio for upward volatility) one must use something called the Sortino Ratio (which was developed by Frank Sortino). Note that this ratio looks at only the downside deviation in the denominator. The Sortino ratio has its own flaws (discussed in the supporting article), but the larger the Sortino ratio, the lower the risk of large portfolio losses occurring in the given portfolio.  Using both of these ratios together can give an investor a better way of measuring excess returns to index benchmarks and the amount of downside risk that might occur in the future.

The next basic concept that I will introduce (and which is discussed but not introduced in the article) is the concept of rebalancing a portfolio as a hedge fund might. Remember that if one rebalances outside of an IRA (individual retirement account) one will create a taxable event and will incur a tax (generally a short-term capital gain or loss). If one is going to rebalance often (and this one model suggests rebalancing every four weeks), then one had better use a traditional or Roth IRA for investing. It is also critical, in my view, that one uses a direct access broker that charges minimum commissions to perform these trades. If you are the one doing the work, why should you pay retail or even a discount broker to them for you? What was it I said weeks ago about the first rule of investing? If you were paying attention out there, you know that the first rule of investing is to KEEP YOUR EXPENSES LOW.

What rebalancing does in a hedge-type strategy is to adjust the amounts invested in each ETF to compensate for deviations of the current movement in price of each ETF when the original investments were made (or at the last time the amounts were rebalanced) to reflect current market conditions (which might favor one ETF over another ETF in terms of percentage of the portfolio). This technique allows the performance (if the strategy works and the fund types are properly correlated) to outperform the general market as the near-term price movements go forward.

What one would have to do to test a technique would be to back test it over time and to see how well they perform in the forward period after the back test is done. As many of you know, I use neural net techniques that do a very rigorous form of walk-forward testing on data not seen by a model. The statistics from that walk-forward analysis gives me confidence that I can continue to trade accurately and profitably from a back-tested model I have built. That is why I emphasize the baseline statistics of the model.

In the next installment I will do my best to show you one example of how this can work using ETFs. It is important that if one wants to run a do-it-yourself hedge fund that one makes certain that back testing be done prior to taking risk. That also means that one would have to calculate the ratios and returns to estimate risk.

I will discuss this in more detail next time.  More educational goodness is flowing your way again soon. Thanks for supporting DieBrokeBlog!


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