Exxon mobil By adabon1 Nov 7, 2008 One Share 73.68 Period: Nov 7, 2008 to Nov 10, 2012 5 Years. Mar 9, 2009 Drop of price 64.03 64.03-73.29= -9.65 (-9.65) Jun 28, 2010 Drop more down. 56.57 56.57+(-9.65)= Feb 21, 2011 Sudden Increase 85.34 Oct 1, 2012 Increase higher. 92.55