Eaton Vance Municipal Bond Fund is a closed ended fixed income mutual fund launched and managed by Eaton Vance Management. It invests primarily in high grade municipal obligations. The fund's investment portfolio primarily includes investments in companies operating in the transportation, water and sewer, and electric utilities sectors. It was formerly known as Eaton Vance Insured Municipal Bond Fund. Eaton Vance Municipal Bond Fund was founded in 2002 and is based in Boston, Massachusetts.