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“MBS are fairly valued but offer the potential for additional yield relative to duration when compared with other high-quality options. In a low-return environment, extra yield is hard to come by, and may have a larger relative impact on portfolio performance than it has in recent years. These factors, along with our belief that MBS may outperform comparable Treasuries if rates stay range bound or rise slightly, make MBS an attractive consideration for suitable investors looking to add high-quality bond exposure to their portfolios,” according to a note from LPL Financial posted by Amey Stone of Barron’s.

There are some particularly specific risks associated with the asset class. For instance, borrowers can prepay mortgages, which poses a large risk in a falling rate environment since borrowers would typically refinance their mortgages at cheaper rates. Consequently, mortgage-backed securities investors would get their principal back before maturity and have to reinvest at the lower rates.

For more information on Fixed-Income ETFs, visit our Fixed-Income category.

iShares MBS ETF