As the title suggests, is there any mathematical explanation or evidence that shows the optimal weights one should align in a passive portfolio consisting of different ETFs…
For example a PF consisting (hypothetical scenario)
- dividend etf
- broad index fund
- international fund
- REIT’s fund
Does investor’s age play a critical role in choosing optimal weights or are there other factors too (apart from risk appetite)? As far as I understand equal weights won’t make much sense in every scenario!!