Exxon's silent treatment on earnings is rankling Wall Street

Wall Street wants answers from Exxon Mobil. For at least a decade, Exxon’s top executives haven’t taken questions from Wall Street analysts during quarterly conference calls. Instead, Exxon only fields its VP for investor relations, a unique practice among the top ten S&P 500 Index companies and rival oil majors Royal Dutch Shell, Chevron, BP and Total.