Vanguard examined three different simulated rebalancing strategies based on a portfolio that had target stock / bond split of 50/50 from 1926 to 2014. (ifa.com)
The old rule of basing stock asset allocation on a formula of «100 minus your age» — leading to, say, a 40/60 stocks / bonds split if you retire at 60 — is outdated. (cnbc.com)