Global Bonds in a Fragmented World

For most U.S. investors, fixed income means U.S. fixed income — Treasuries, investment-grade corporates, munis — as the domestic bond market is deep, liquid, and more than sufficient to build a diversified portfolio. But, in today’s increasingly fragmented global economy, U.S. fixed income investors face a pivotal choice: remain anchored in a domestic bond market that now represents less than 40% of the world’s outstanding debt or embrace a more complete opportunity set that includes non-U.S. developed and emerging market debt. The case for inclusion is not necessarily tactical but philosophical — an acknowledgment that portfolio resilience may demand exposure to differentiated economic cycles, monetary policies, and growth engines beyond America’s borders. Non-U.S. developed market bonds from issuers like Germany, Japan, the U.K., and Australia, alongside emerging market (EM) debt in both hard and local currencies, offer U.S. investors a combination of higher income potential, diversification, and long-term structural tailwinds that domestic Treasuries and corporates alone may not be able to replicate.

At its core, this argument rests on the recognition that the U.S. bond market, while deep and liquid, is increasingly concentrated in its risks — elevated fiscal deficits, political polarization, and potential term premium stubbornness. By contrast, non-U.S. developed debt provides access to alternative yield curves shaped by divergent central bank mandates, from the European Central Bank’s (ECB) data-dependent easing to the Bank of Japan’s yield curve management. EM debt, meanwhile, delivers compelling carry (higher yields) in an environment where many EM central banks have already delivered rate cuts amid cooling inflation and resilient domestic demand. With yields on hard-currency EM sovereign benchmarks still hovering above 6% (per the Bloomberg EM USD Aggregate Index) and local-currency real yields offering attractive compensation, these assets have historically delivered mid-single to low-double-digit returns over multi-year horizons, often outperforming U.S. high-yield on a risk-adjusted basis.