I have read that as a rule of thumb portfolios that survive through bad times and do just fine in good are generally well-diversified portfolios. Well, recently I saw this really good data table (below) in the 2017 CFA level 3 curriculum which I think is worth sharing because it gets you to really think about what a well-diversified portfolio looks like and how it performs. Note, how the diversified portfolio, which is made up of the other listed "asset classes", consistently appears in the middle holding its own.
