Exxon, Chevron shares plunge after weak results spook Street

Exxon Mobil Corp and Chevron Corp posted rare quarterly earnings misses on Friday as cost cuts and rising oil prices failed to offset weakness in international refining operations, sending shares of both companies plunging.The results surprised Wall Street, where analysts had been steadily raising expectations due to stronger crude prices and a rebounding global economy, according to Thomson Reuters data."We got carried away with our expectations, and by we, I mean Wall Street as a whole," said