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Author: yodaorange Big red star, 1000 posts Feste Award Nominee! Feste Award Winner! Old School Fool Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: of 455469  
Subject: Glidepath investing for retirement Date: 9/25/2012 7:27 PM
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Rob Arnott of Research Affiliates released a significant paper today entitled “The Glidepath Illusion.” [1] Glidepath refers to the conventional asset allocation for retirement saving. Younger savers have a high allocation to equities which slowly “glides down” to a small allocation when retirement starts. This model only has two asset classes: equities and bonds, so the bond allocation rises towards retirement. The rationale for this Glidepath is that bonds are less risky than equities and near-retirees cannot tolerate the equity risk.

Rob decided to question the Glidepath model to see how it performed. He used actual equity and bond returns from 1871 through 2011. The key assumptions are the worker saved $1,000 real per year for 41 years. Real means that the actual amount increased at the same rate as inflation, so it went up over the 41 years in nominal terms.

Further, Rob tested three scenarios:

1) 80% equities/20% bonds gliding to 20%/80% (conventional recommendation)
2) 50% equities/50% bonds unchanged (~ balanced portfolio)
3) 20% equities/80% bonds gliding to 80%/20% (BACKWARDS to conventional recommendation)

Rob reports surprising results. The Inverse Glidepath had the best results.




Standard Balanced Inverse
80%/20% 50%/50% 20%/80%
Glidepath Glidepath


****************Ending assets*********************

Average $124.460 $137,870 $152,060
Minimum $49.940 $51,800 $53,040
10 percentile $73,550 $78,820 $79,300
50 percentile $119,760 $142,620 $148,240
90 percentile $177,400 $184,090 $227,760
Maximum $211,330 $209,110 $286,920



The inverse Glidepath has the best median, average, 10%, minimum, 90% and maximum return. Lest you think these results are purely as a results of the exact sequence of returns, Rob took each of the annualized returns and “randomized” them. The results were the same with the inverse Glidepath coming out on top.

Rob has written extensively that investors should be planning for lower returns going forward. Large factors are the low stock dividend yield and low bond yield the market currently has. For this study, he arbitrarily lowered the expected equity returns and bond returns. The results were the same with the inverse Glidepath coming out on top again.

BOTTOM LINE is these are significant results that we should strongly consider in retirement planning for young people. If you are already near retirement or in retirement, the results have less bearing on your asset allocation.

There is one other point which is also significant. The MINIMUM amount for the conventional Glidepath had $49,940. This is for a cumulative investment of $41,000. It proves if you are a really unlucky saver, you can do everything right and still retire close to broke.
The paper is 5 pages long, but is worthwhile IMO. If nothing else, you might read it and see if it applies to any investors you know.

Thanks,

Yodaorange


[1] Rob Arnott: The Glidepath Illusion (Free registration might be required.)
http://researchaffiliates.com/ideas/pdf/fundamentals/Fundame...
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