…or rather "Some things I've learned about calculating and projecting standard deviation of returns from a short frequency measurement (monthly) to a longer frequency horizon (year)."
[ Note: since I clearly don't know this material nearly as well as I think I do, this post will continue to be a work in progress which I will update as I learn and assimilate more over time.]
If you asked me how many people out of, say, 400 million in the US were interested in standard deviation projections I'd have to guess the sub-population is relatively small, maybe 10s of thousands and that may be generous though it may be more. If, of that sub-population, one were to ask how many are really, truly interested in whether using the square root of 12 (SQ12) is "good enough" to project a standard deviation using monthly return data to an annual horizon or if there is something better or more correct, well then, we are down, if I am not being overly dramatic, to maybe hundreds (maybe more). I know there is at least one because he is writing this sentence and probably more than one because I am reacting to an article or two on this subject.