This low-cost international dividend ETF nearly doubled the S&P 500's return in 2025 -- but replicating that performance will require the stars to align once more.For more than a decade, American investors who ventured abroad were punished for their diversification. International stocks trailed U.S. equities in 13 of the 17 years following the 2008 financial crisis, as American growth stocks dominated global returns, turning "U.S. exceptionalism" into Wall Street gospel.Then 2025 happened -- and one exchang ...