The Goldman Sachs Municipal Income Completion Fund Separate Account Institutional Shares (GSAAX) is a mutual fund that focuses on investing in municipal bonds. These bonds are issued by state and local governments to fund public projects and services. The fund aims to provide investors with a steady stream of tax-free income while also preserving their capital. As an institutional share class, this fund is designed for larger investors such as institutions and high net worth individuals. GSAAX is managed by Goldman Sachs Asset Management, a reputable and experienced investment firm.