The International Monetary Fund has said that Nigeria maintained its lead as the biggest economy in Africa and 26th in the world in terms of the size of the country’s estimated $442.976 billion GDP. The IMF however cautioned that the country’s economy faced numerous challenges, including uncertainty over the COVID-19 pandemic, low oil prices, capital outflows, balance of payment challenges, and rising unemployment. In addition, it said, supply shortages have pushed up headline inflation to a 30-month double digit high, where it is projected to stay despite an expected easing of food prices.