....
The other thing to point out is that FIREcalc assumes you maintain your asset allocation. So if you have stocks and bonds in a 60:40 ratio, it assumes that you are annually rebalanced to that ratio. If your withdrawal from stocks impacts that AA, then FIREcalc assumes you adjust for that impact.
+1. Now let's put some numbers to that to illustrate:
Say you are 75/25 (the FIRECalc default), and say you WD a not-so-conservative 4% annually (I did skim your intro post, sounds like you'll be less than 4% anyhow). For each Million in the portfolio, that's:
$750K in stocks, $250K in Fixed Income.
That will kick off at least $20K in dividends, so you only need to withdraw $20K by selling anything. And let's make the drop 10% for added effect, and assume bonds stayed flat. That puts you at:
$675K Stocks, $250K Fixed = $925K. After a $20K withdrawal, you'd have $905K.
So to maintain your 75/25 after the withdrawal, you want to target:
$679K in Stocks, $226K in Fixed.
So you see,
you actually buy more stocks ($4K worth), you don't sell stocks when they are down. You took the $20K from Fixed, and pull another $4K to buy stocks to go from $250K in Fixed to $226K in Fixed to maintain 75/25.
Personally, I probably would not bother with the $4K swap, it's a small % and portfolio success is not very sensitive to AA anyhow.
-ERD50