ExxonMobil expects its earnings to grow by more than US$4 billion from 2019 to 2020, the U.S. supermajor said in its Investor Day presentation on Wednesday. In 2018, Exxon booked earnings of US$20.8 billion, up by 6 percent compared to 2017. Despite weaker margins in the downstream and the drop in oil prices in Q4, Exxon’s full-year 2018 cash flow from operating activities jumped to US$36 billion from US$30 billion for 2017. The 2018 cash flow from operations was the highest since 2014, the company said. According to today’s…