A recent article about ETFs to buy from Morningstar.com caught my attention for a few reasons. First, Ryan Jackson, a manager research analyst for passive strategies for Morningstar, recommended highly rated ETFs that have struggled recently. That’s the buy-on-the-dip investment strategy — never a bad one. Secondly, Jackson’s three choices made for an intriguing 3-ETF, 60/40 portfolio. Jackson didn’t talk about this angle; I just went with it. You put 40% in the Invesco Total Return Bond ETF (NYSEARCA:GTO), ...