Benchmark crude oil prices fell on 27 August, after Gulf of Mexico oil producers shut in around three quarters of capacity as Tropical Storm Isaac headed for landfall. The decline came because traders anticipated a short term decline in demand, due to refiners also shutting down plants as the storm gathered strength on its route towards Louisiana. WTI crude fell by $0.68/B on the day to settle at $95.47/B, while Brent crude lost $1.33/B to settle at $112.26/B.