Abraaj case likely to tarnish perceptions of PE investors. : Dubai: The private equity industry in the Middle East and North Africa (Mena) region has been facing challenging times in fund raising in recent years and the recent developments relating to Abraaj is expected to impact investor perceptions.Fund raising remained challenging for the private equity and venture capital business in the region in 2016 and 2017, according to data Mena Private Equity & Venture Capital Association.During the last two years, conditions remained challenging due to economic headwinds and geopolitical factors.