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Should you diversify your bond investments across many foreign countries?
The Vanguard Emerging Market Bond Index has a SEC yield of 4.62%, an expense ratio of 0.34%, a purchase fee of 0.75%, and an average duration of 6.7 years.  The Vanguard Emerging Market Bond Index only invests in US Dollar denominated securities, so it is not exposed to currency risk.  The US Intermediate Term Bond Index Fund has a SEC yield of 2.59%, an expense ratio of 0.1% and an average duration of 6.5 years.  So after expenses, the emerging market bond fund gives you 1.04% of extra yield (more in subsequent years as the purchase fee is only paid once).   Here are the results of a study by Vanguard: Based on our findings, we believe that most investors should consider   adding [currency risked] hedged foreign bonds to their existing diversified portfolios. I think a globally diversified bond portfolio results in a portfolio that's more diversified.