Vanguard Total International Stock (VTIAX/VXUS)

Vanguard Total International Stock (VTIAX/VXUS) provides essential geographic diversification by covering over 7,800 stocks across developed and emerging markets outside the U.S. at a 0.07% expense ratio. This hedges against American market concentration risk, as 40% of global equity value is now non-U.S. It outperforms #2 VFIAX in reducing single-country risk, with a 15% allocation to emerging markets compared to VFIAX's 0% exposure.