Inverse ETFs are shorts, let's be real for a second :). And I'm well familiar with risk parity.
Bonds+stocks only doesn't protect you from stagflation (inflation up, growth down) or a depression (inflation around zero, growth down).
Bonds+stocks+gold only doesn't protect you from a depression.
Both a depression and a stagflation can easily last for over 5 years, so it should be taken seriously, IMHO.
Related: https://www.artemiscm.com/ (see the paper linked below; note that this is also a sales pitch from a long vol fund, so possibly it's a little too optimistic about the strategy).
Bonds+stocks only doesn't protect you from stagflation (inflation up, growth down) or a depression (inflation around zero, growth down).
Bonds+stocks+gold only doesn't protect you from a depression.
Both a depression and a stagflation can easily last for over 5 years, so it should be taken seriously, IMHO.
Related: https://www.artemiscm.com/ (see the paper linked below; note that this is also a sales pitch from a long vol fund, so possibly it's a little too optimistic about the strategy).