“This is a theme that’s only now getting started,” Jose Morales, chief investment officer at Mirae Asset Global Investments in New York, said in the article.

The iShares MSCI Emerging Markets Index Fund (NYSEArca: EEM) has a yield of 2.26% and is one of the largest emerging markets ETFs. Vanguard Emerging Markets ETF (NYSEArca: VWO) has a 5% yield and around $53 billion in assets under management. Dividend focused funds also track overseas companies with a healthy yield, so that investors can get overseas exposure with an income stream that is usually higher than those of U.S. domiciled companies. [Emerging Market Dividend ETFs: How to Choose the Right Fund]

High yield corporate bonds are a corner of the market that has appealed to investors especially with the advent of the ETF. The risk factor is higher with junk bonds, but with an ETF, the “pinch” is not so harsh should a company default.

“With yields averaging just over 6%, sub-investment-grade corporate bonds are attractive compared with the 10-year Treasury note and carry less risk than they did in the aftermath of the 2008 financial crisis,” Burton wrote.

ETFs such as SPDR Barclays High Yield Bond ETF (NYSEArca: JNK) offer higher yields at 6.66% and the iShares iBoxx $ HY Corp Bond Fund (NYSEArca: HYG) offers a 6.32% yield. [High Yield ETFs Climb to New Highs as Treasuries Languish]

Tisha Guerrero contributed to this article.

Full disclosure: Tom Lydon’s clients own EEM, DVY, JNK and HYG.