To: bwtidal who wrote (6949 ) 11/19/2002 12:01:18 PM From: Wyätt Gwyön Read Replies (1) | Respond to of 306849 indeed, yours seems to be correct based on Scowcroft's response to ild. put in that perspective, -173K seems to be a very large number. especially when that number is the result of assumptions that are probably still too rosy. one obvious assumption that will change is that people will be forced to live on less than 75% of current income (the AARP assumption used by Scowcroft). if they live on 50% of income, then maybe their net worth balances out. of course, that means they spend less, which is bad for the economy. on the other hand, they will probably work longer, which is good for the economy and also good for them (the workers). the other assumption that will probably change, or which i would consider highly unrealistic in general (i don't know Scowcroft's in particular), is the returns assumption. basically, return models should assume that 2.5-3% of portfolio value can be taken out each year in real terms. but instead they rely on things like 5% or 6%, or in the case of pension funds living in lala-land, 9-10%. higher assumptions than that, which are common among "individual investors"? let's not even go there. but if you want to lock in a real return from the government, you might buy TIPS, which are yielding well below 3%. so if you use the TIPS return as an assumption, say 2.5%, then $55,000 in real income requires an investment of $2.2 million, in contrast to the $1 million-1.375 million you showed for nominal rates of 5.5% and 4%. (of course, the average person will be relying on Social Security and such as well, so they probably don't need the whole $55K from private assets, but still, this assumption change could make the -173K figure appear a lot worse.) i believe 2.5% real annual return is also a generous assumption for the SPX over the next 30 years. however, i think corporate bonds should do better unless we get nuked. as you are familiar with Bernstein's site, you may be interested to note that he was recently quoted in the WSJ saying that a real return assumption of around 3% is prudent. last year he also had an interesting article about the relationship between return probability assumptions (like "this plan with such-and-such assumptions has a 97% success probability") and outlier events. like us getting nuked by terrorists. interestingly, that article appeared in the fall edition of EF, and came out before 9/11 as i recall. rather prescient. here's the link for those interested: The Retirement Calculator from Hell, Part III: Eat, Drink, and Be Merryefficientfrontier.com