With government bond yields still low in the U.S. and throughout the developing world, income investors continue embracing emerging markets debt and exchange traded funds, such as the iShares J.P. Morgan USD Emerging Markets Bond ETF (NYSEArca: EMB).

EMB tracks the J.P. Morgan EMBI Global Core Index, a market-cap-weighted index. Potential investors should note that since it is a cap-weighted index, countries with greater debt will have a larger position in the portfolio. EMB is now the world’s largest emerging markets bond fund, ETF or mutual fund, and the popularity of EMB and some rivals comes against what used to be a challenging backdrop: Rising interest rates in the U.S.

“Initial concerns that protectionist policies could hurt EM economies and investments abated after the new administration stepped into office. As a result the category has done surprisingly well since the start of the year: $3.4 billion has come into EM bond ETFs, and the J.P. Morgan EMBI Global Core Index has returned a robust 5.17%. (Source: Bloomberg, through 4/18/17),” said BlackRock in a note out last Friday.

While there are concerns over potential protectionist policies that could leave emerging countries out to dry, emerging market fundamentals, like growth, debt stock, real rates and policy flexibility, all remain at a favorable starting point relative to developed economies going forward this year.

Factors like U.S. rates, growth and inflation, EU and Japanese monetary policies could all potentially weigh in the emerging market outlook. While emerging markets bonds can be a tricky asset class to navigate, data suggest passive management works.

“EMB has outperformed more than half of the active mutual funds over longer time frames. EMB is a market capitalization-weighted index fund. In this illiquid, high-transaction-cost market, fewer than half of the active mutual funds in the U.S. have been able to beat EMB since its inception nine-plus years ago,” according to BlackRock.

EMB has an effective duration of just under seven years and a 30-day SEC yield of 4.6%. None of the ETF’s geographic weights account for more than 6.2% of EMB’s roster. The top four country holdings are Mexico, Indonesia, Turkey and Russia. EMB’s holdings have a weighted average maturity of 10.75 years, according to issuer data.

For more information on the fixed-income market, visit our bond ETFs category.

Tom Lydon’s clients own shares of EMB.