Profits for Exxon Mobil and Chevron were slammed by slumping fuel margins as the prospect of U.S. tariffs on two major oil suppliers threatens to make the refining business even worse.

Imperial Oil Ltd (TSX:IMO) reported its fourth-quarter 2024 earnings, revealing a mixed performance with an earnings per share (EPS) of $2.37, surpassing the forecast of $2.07. However, the company ...