Many readers of this blog contact me directly with questions and comments. While often the responses are very specific to a particular circumstance, occasionally the subject matter is general enough that it might be of interest to others as well. Accordingly, I will occasionally post a new "MailBag" article, presenting the question or comment (on a strictly anonymous basis!) and my response, in the hopes that the discussion may be useful food for thought.
In this week's MailBag, we look at some issues with Monte Carlo retirement plan projections, cash-flow versus goal-based planning software, and the appropriateness of using arbitrary-age life expectancy assumptions (e.g., all clients assumed to live to age 95) versus more client-specific or entirely randomized life expectancy in the Monte Carlo projection.