Nuveen Insured Municipal Opportunity Fund, Inc is a close ended fixed income mutual fund launched by Nuveen Investments Inc. The fund is managed by Nuveen Asset Management. It invests in the fixed income markets of the United States. The fund invests in companies operating across 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 formed on September 19, 1991 and is domiciled in United States.