Nuveen Insured Municipal Opportunity Fund, Inc is a close ended mutual fund launched and managed by Nuveen Investments Inc. It invests in the public equity markets of the United States. The fund?s investment portfolio primarily consists of investment in companies operating in various sectors, including transportation, healthcare, utilities, housing/multifamily, and water and sewer sectors, as well as tax obligation/limited, tax obligation/general, the United States guaranteed. Nuveen Insured Municipal Opportunity Fund was founded in 1991 and is domiciled in the United States.