I think the risk for increasing your bond exposure as compensation would be if instead of a low growth/low inflation scenario (Bonds do well) there's a low growth+high inflation scenario (1940s, 1970s, 2022) and the negative correlation between stocks and bonds doesn't hold.
replyYeah, but in the abstract that's just saying "if you time the market, you can beat it", and we know that generally, the only way people are able to time the market is with random luck.
replyAnd more specifically, it's not low growth/high inflation that kills bond portfolio returns, it's interest rates increasing that devalue bonds, i.e. the transition from low inflation to high inflation. So yeah, you can construct a portfolio that hedges against that... but I'd be surprised if you can do it without decreasing your risk-adjusted expected returns below a plain stock/bond index fund - whatever hedging method you use is either going to increase your interest-rate risk (bonds), or your inflation-rate risk (cash), or is going to limit your upside (buffer etfs), or is just going sap your upfront returns (protective puts).