I currently approximate the total stock market with three index funds (S&P 500, mid cap, small cap). I am considering moving as much as I can of my mid & small cap funds into my Roth IRA and leaving the S&P 500 fund in my main (taxable) account.
Is this a known strategy with documentation I can read up on? Any relevant forum posts, books, websites, research papers, etc. about this topic?
I have seen many previous discussions on small and mid cap tilting, but couldn't find much info on splitting a total stock market approximation across accounts.