The hidden cost of: "Just buy VT"

A 56-year backtest comparing 100% VT against three alternative regional slice allocations using 3 rebalancing strategies: B&H = buy and hold R-1y = rebalance every year R-5/25 = rebalance when a 5% absolute or 25% relative to target deviation occurs The following portfolios were tested: P1: 100% VT P2: 60% VTSAX / 40% VTIAX P3: 60% VTSAX / 32% VTMGX / 8% VEMAX P4: 60% VTSAX / 20% VEUSX / 12% VPADX / 8% VEMAX Results: B&H R-1y R-5/25 Portfolio gmean/stdev gmean/stdev gmean/stdev P1 9.33/17.08 9.3