Identifying the best-performing all-world or global equity exchange-traded fund depends on whether performance is measured over short-term windows or long-term multi-decade horizons. Prominent global index funds tracking broad international equities include the Vanguard FTSE All-World UCITS ETF and the iShares MSCI ACWI UCITS ETF, which capture large- and mid-cap stocks across developed and emerging markets. While past performance fluctuates depending on geographic sector rotations and currency movements, these core funds remain popular benchmarks for global diversification.