Amid spat between Invesco and Zee Entertainment over convening an Extraordinary General Meeting (EGM) for removing the company's Chief Executive and Managing Director Punit Goenka as well as two other directors of ZEEL, the Invesco Developing Markets Fund (formerly Invesco Oppenheimer Developing Markets Fund), has released an open letter reinstating the urgent need for strengthened independence on the board given "governance and leadership failures."