Vanguard Mortgage-Backed Securities 

This ETF is designed to deliver a consistent and reasonable stream of current income for its investors. It primarily allocates its assets to pass-through debt instruments that are secured by U.S. mortgages and guaranteed by federal entities such as Ginnie Mae (GNMA), Fannie Mae (FNMA), and Freddie Mac (FHLMC). The fund exhibits an intermediate level of interest rate sensitivity, with the dollar-weighted average maturity of its holdings typically spanning between three and ten years.