Invesco Van Kampen Muni Tr $4,768 Invesco Van Kampen Muni Op $15,587 Invesco Van Kampen Advanta $6,131 Invesco Van Kampen Tr For $2,458 Invesco Van Kampen Muni Tr $4,768 Invesco Van Kampen Muni Op $15,587 Invesco Van Kampen Advanta $6,131 Invesco Van Kampen Tr For $2,458