Nuveen AMTFree Municipal Credit Income Fund is a closed ended fixed income mutual fund launched by Nuveen Investments Inc The fund is comanaged by Nuveen Fund Advisors LLC and Nuveen Asset Management LLC It invests in the fixed income markets of the United States The fund invests in undervalued municipal securities and other related investments exempt from regular federal income taxes that are rated BaaBBB or better by SP Moodys or Fitch and that have an average maturity of 1702 years It employs fundamental analysis with bottomup stock picking approach to create its portfolio The fund benchmarks the performance of its portfolio against Standard Poors SP Insured Municipal Bond Index It was formerly known as Nuveen Insured Dividend Advantage Municipal Fund It was formerly known as Nuveen Enhanced AMTFree Municipal Credit Opportunities Fund Nuveen AMTFree Municipal Credit Income Fund was formed on July 12 1999 and is domiciled in the United States