NW-Bound
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
- Joined
- Jul 3, 2008
- Messages
- 35,712
As described in an earlier post on another thread (see this), I described a portfolio on FIRECalc that beats the standard simple 2-component portfolio, in that the better portfolio has the higher minimum value during a 30-year retirement period for the same WR. I also described how this was the same "minimax" problem that is often encountered in engineering.
Just now, I thought about this some more, and played a bit more with FIRECalc. After about 1/2 hour, I came up with a far superior portfolio than the earlier one. See the following FIRECalc screen capture.
Basically, it's a 50/50 portfolio, where the equity half is divided between small cap value and large cap value. The fixed income half is divided equally between corporate bonds, long treasuries, and short-term cash. It's as simple as that.
Here's what FIRECalc says for a 4% WR over 30-year periods.
The $623K min value for 4% WR is far superior to the one I got earlier, which was $400K for 3.3% WR. The superior historical return of value stocks is confirmed by this FIRECalc run.
Note that I changed the default 0.18% expense ratio to 0.10% to reflect today's competitive values.
Ideally, the optimization would be done by software, but I do not have access to the FIRECalc engine to wrap an optimization algorithm around it. Hence, I played with it by hand, but believe the presented solution is fairly close to the real optimal one.
So, go ahead and tweak the mixture of this portfolio by adding a bit here, or subtract a little there to see if you can improve much on it. Then, post your better result here.
I really think this is something I can implement in real life!
Just now, I thought about this some more, and played a bit more with FIRECalc. After about 1/2 hour, I came up with a far superior portfolio than the earlier one. See the following FIRECalc screen capture.
Basically, it's a 50/50 portfolio, where the equity half is divided between small cap value and large cap value. The fixed income half is divided equally between corporate bonds, long treasuries, and short-term cash. It's as simple as that.
Here's what FIRECalc says for a 4% WR over 30-year periods.
FIRECalc looked at the 49 possible 30 year periods in the available data, starting with a portfolio of $1,000,000 and spending your specified amounts each year thereafter. Here is how your portfolio would have fared in each of the 49 cycles. The lowest and highest portfolio balance throughout your retirement was $623,158 to $7,680,224, with an average of $2,685,554. (Note: values are in terms of the dollars as of the beginning of the retirement period for each cycle.)
The $623K min value for 4% WR is far superior to the one I got earlier, which was $400K for 3.3% WR. The superior historical return of value stocks is confirmed by this FIRECalc run.
Note that I changed the default 0.18% expense ratio to 0.10% to reflect today's competitive values.
Ideally, the optimization would be done by software, but I do not have access to the FIRECalc engine to wrap an optimization algorithm around it. Hence, I played with it by hand, but believe the presented solution is fairly close to the real optimal one.
So, go ahead and tweak the mixture of this portfolio by adding a bit here, or subtract a little there to see if you can improve much on it. Then, post your better result here.
I really think this is something I can implement in real life!
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