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Self-directed portfolio performance

Last post 08-20-2008 10:41 AM by scottb. 6 replies.
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  • 08-12-2008 4:02 PM

    Self-directed portfolio performance

    Scott,

     Just looked at the "Latest Self-managed Couch Potato Portfolio Performance" on your main page, and it seems like the last 2 columns have changed.  If memory serves it used to show performance back to 8/2001.  Now it is only showing back to 8/2003 (which is the same as 5 years).  Why did this change?

     Dave

  • 08-12-2008 4:44 PM In reply to

    Re: Self-directed portfolio performance

    Dave,

     Your memory is correct. We made the change as a foundation for better reporting.

    Until this month the longest period we reported was from a fixed date and we calculated the standard deviation for that time period. This was good information, but it isn't very useful to visitors because it couldn't be compared to any standard reference. Morningstar, for instance, regularly reports on trailing standard deviations for several time periods.

    By reporting on the trailing 5 year performance (which we always did before) AND adding the trailing 5 year standard deviation you'll be able to measure both the Couch Potato and AssetBuilder portfolios against the regular figures provided by Morningstar for managed mutual funds.

    It will then be possible for us to demonstrate the benefits of having risk-efficient portfolios. Our expectation is that AssetBuilder portfolios will provide higher returns than Couch Potato portfolios of similar risk. We also expect that this advantage will apply over the majority of managed portfolios.

    Here, for instance, are two examples.

    The Six Ways from Sunday Couch Potato portfolio returned 14.47 percent over the last 5 years with a standard deviation of 9.19 percent. The AssetBuilder 10 portfolio returned 15.24 percent with a standard deviation of 9.22. Note the return advantage.

    Similarly, the Four Fold Couch Potato portfolio returned 10.23 percent with a standard deviation of 6.47 percent while the AssetBuilder 8 portfolio returned 11.75 percent with a standard deviation of 6.50 percent.

    The risk-efficiency is clear here. In early tests we've found that AssetBuilder portfolios also generally beat about 80 percent of all managed portfolios when you compared portfolios with similar standard deviations. Stay tuned and we'll report more. 

    Scott

  • 08-12-2008 6:00 PM In reply to

    Re: Self-directed portfolio performance

     It makes sense to provide the 5-yr standard deviation, but personally I liked seeing the longer returns/standard deviations as I find them more useful for long term planning (5 yrs seems a bit short to be truly historical).  Is there any way to have both?  I would do it myself but I don't know of an easy way to calculate returns and standard deviations for a whole portfolio.

  • 08-14-2008 9:52 AM In reply to

    • jmaxey
    • Top 150 Contributor
    • Joined on 05-24-2007
    • Posts 2

    Re: Self-directed portfolio performance

     While I agree that the 5-yr std deviations are a useful addition,

    I also prefer keeping the longer term data as well, due to it's

    coverage of multiple down-cycles.  

  • 08-15-2008 12:53 PM In reply to

    Re: Self-directed portfolio performance

    Understood. We like the long measurements but the one we were using was based on a single start date and didn't connect to any readily available comparison data such as the 3, 5 and 10 year standard deviation figures provided by Morningstar for mutual funds.

    What we're trying to do is provide transparency and easily used data. I'd like to hear more comments when we start to show how to use the figures we provide to examine the relative risk efficiency of AssetBuilder portfolios and commonly available mutual funds.

    Scott

  • 08-19-2008 7:54 PM In reply to

    Re: Self-directed portfolio performance

    Dave,

     

    I read yours and Scott's posts with a chuckle. The risks and returns you and Scott are assessing are by AB’s own admission “science fiction” (their so-called rocket science applied to create fictitious portfolios).

     

    Scott describes them in various posts as “our” returns or “our” portfolios. This is deceptive. The portfolios are NOT representative of either the risk levels or returns AB clients have actually achieved during those periods. AB has only been around about a year and a half and their fictitious portfolios have under gone at least one significant revision during that brief period.

     

    What Scott is apparently referring to but fails to adequately disclose is what they do represent. The portfolios displayed on AB’s site represent the risk levels and returns for funds and asset mixes, which in retrospect, AB would have preferred they own with the benefit of hindsight. That is, he is referring to the performance of fictitious portfolios constructed with the full knowledge of how both the asset classes and funds HAD performed after-the-fact, or a process known as “back testing.” His failure to disclose this is misleading and implies AB performance is much better than it is.

     

    AB’s disclaimer identifies their model portfolios as “fictitious” which the dictionary defines as "not true or genuine, intended to deceive, or invented by someone’s imagination."

     

    Scott claims AB’s portfolios beat 80% of all managed accounts in early testing. Unless his performance claims represent the actual results of AB’s clients, and were audited and prepared in accordance with AIMR standards, it is merely a case of what the SEC describes as “exaggerated performance claims,” common with new start-ups.

     

    I and others would certainly welcome Scott’s promised transparency and trust my observations were helpful highlighting some useful places to start.

     

    Rick

  • 08-20-2008 10:41 AM In reply to

    Re: Self-directed portfolio performance

    Rick,

    I find your choice of loaded words hostile, argumentative and entirely unconstructive.

    We have never represented AssetBuilder model portfolios as anything but model portfolios. Even the 5-year performance period is much longer than AssetBuilder has been in existence. Since few clients have their portfolios put together starting on an exact measuring period, actual results will vary with the precise start date. You know that. So does AIMR. The model portfolios exist for a single purpose---to provide a standard period of measurement so they can be compared with others.

    The same applies to our reporting of the performance and risk for the Couch Potato Building Block portfolios. These are model portfolios that I have written about for years. While the basic Couch Potato portfolio has been in existence for nearly 20 years, the Margarita portfolio was not created until March 2004 (http://assetbuilder.com/blogs/scott_burns/archive/2004/03/16/The-Margarita-Portfolio.aspx) and the Couch Potato Building Blocks were not created until March 2005. (http://assetbuilder.com/blogs/scott_burns/archive/2005/03/20/Introducing_3A00_-The-Couch-Potato-Building-Blocks.aspx). It could be argued that reporting 5 year performance data is too long.

    In fact, readers want some measure of longer term performance. It is both reasonable and possible to provide such data. So we do.

    That said, model portfolios are model portfolios. They are hypothetical.

    Our goal at AssetBuilder is to provide transparent, accessible and useful information.

    We will provide this for self-directed investors who will manage their own index-fund based portfolios.

    We will do this for AssetBuilder clients and those thinking of becoming AssetBuilder clients. 

    The entire AssetBuilder team is dedicated to doing this with the intensity of effort and integrity of purpose that I have brought to personal finance and investing since I started my newspaper column in 1977. That's today. That's reality.

    Scott

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