Robmens Holdings is a large financial services company with a big portfolio in Ghana, specializing in general investments with emphasis on government securities. In response to a recent domestic debt exchange program introduced by the government which has eroded the business of its stable investments, Robmens Holdings has made the strategic decision to diversify its business portfolio in order to remain competitive.

As the Head of Business Strategy of the group, you have been tasked to develop a comprehensive diversification strategy for Robmens Holdings, focusing on introducing new products and initiatives which will grow their portfolio, increase customer retention and drive ownership at the employee level.

Please provide a comprehensive response, outlining the specific steps, methodologies, and strategies you would employ to address each aspect outlined above