Invesco Municipal Opportunity Trust is a closed ended fixed income mutual fund launched by Invesco Ltd The fund is comanaged by Invesco Advisers Inc INVESCO Asset Management Japan Limited INVESCO Asset Management Deutschland GmbH INVESCO Asset Management Limited Invesco Canada Ltd Invesco Hong Kong Limited and INVESCO Senior Secured Management Inc It invests in the fixed income markets of the United States The fund primarily invests in investment grade municipal securities which include municipal bonds municipal notes municipal commercial paper and lease obligations It employs fundamental analysis with bottomup security selection approach to create its portfolio The fund was formerly known as Invesco Van Kampen Municipal Opportunity Trust Invesco Municipal Opportunity Trust was formed on April 24 1992 and is domiciled in the United States