16 June 2014 at 7:13 GMT
By Mads Koefoed
Marathon Oil, the Houston, Texas-based explorer and producer of oil goes up against the behemoth ExxonMobil following a solid week which saw its shares gain 3.3 percent. In comparison. ExxonMobil only managed a 1.1 percent and the spread between these two has thus widened to minus 2.9 as a result.
There has been plenty of action in oil and gas recently and the pairs in second and third spot also have spreads wider than two.
-- Edited by Martin O'Rourke