The Irving, Texas company disclosed plans to put its share buyback plan on hold to preserve cash, an unexpected step after the company spent $3 billion in 2015 to reduce its share count. Rex Tillerson , chief executive, said the company would slash spending by 25% this year. That is much more than some analysts expected, said Guy Baber, an analyst at Simmons & Company International. Exxon joins BP BP -8.52 % PLC and Chevron Corp. CVX -4.73 % in reporting losses or sharply lower profits for the fourth-quarter and full-year of 2015. BP Tuesday announced a $5.2 billion loss for last year, an amount comparable to 2010 when it lost billions after the Deepwater Horizon oil spill in the Gulf of Mexico. The London-based oil giant plans to cut 7,000 jobs by 2017. Chevron Corp. of San Ramon, Calif. said last week it would cut spending by $9 […]