The Vanguard Mortgage-Backed Securities Index ETF (NYSEArca: VMBS) also tracks agency issued mortgage-backed securities. VMBS fell 2.8% over the past three months. The Vanguard fund has a 0.12% expense ratio, a 0.86% 30-day SEC yield and a 5.1 year duration.

Additionally, the SPDR Barclays Capital Mortgage Backed Bond (NYSEArcA: MBG) follows the SPDR Barclays Mortgage Backed Bond ETF. MBG has a 0.32% expense ratio, a 0.44% 30-day SEC yield and a 5.59 year duration. The fund has gained 2.8% over the past three months.

iShares MBS Bond ETF

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

Max Chen contributed to this article.

Story updated to correct spelling of Morningstar analyst name.