Showing posts with label SWRs. Show all posts
Showing posts with label SWRs. Show all posts

Sunday, February 7, 2010

SWRs

Having brought up the subject of Safe Withdrawal Rates here, I reckon I should amplify my thoughts.

Historically, a portfolio of U.S. stocks would have lasted at least 30 to 40 years had you withdrawn 4% of your initial portfolio, increasing each year with inflation.
That's a worst case scenario. Click.
For example, an S&P500 portfolio would last 40 years if the withdrawal rate were anywhere from 4% to over 12%.
But that'd depend upon when you started withdrawing!


Note the "worst case" SWR. It's about 4%.

So is the infamous 4% rule useful? Indeed!
When you're young and figure you'd need to withdraw $A each year, at retirement, how large should your portfolio be?
You should try to achieve a portfolio of $25A.
That way, A is 4% of your retirement portfolio, eh?
Aah, but at retirement, you should ignore the 4% and make sensible withdrawals.

Anyway, that's my position and I'm stickin' with it!

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P.S.
To see the possible variations in future S&P portfolio values, we can select random monthly returns from the 1950s, 1960s, etc. and generate a 120 month portfolio:

Scary, eh?