Fund Description: Nuveen Select Tax-Free Income Portfolio is a closed-end management investment company. The Fund's investment objective is to provide stable dividends exempt from regular Federal income tax, consistent with preservation of capital. The Fund will invest substantially all of its assets in a diversified portfolio of long-term investment grade quality Municipal Obligations. The Fund will only purchase Municipal Obligations rated within the four highest grades, except that up to 20% of the Fund's assets may be invested in unrated Municipal Obligations deemed to be of comparable quality. The Fund may invest up to 20% of its net assets in municipal obligations that pay interest subject to the federal alternative minimum tax. The Fund's investment advisor is Nuveen Advisory Corp.