Correction: Iranian Light and Iranian Heavy crude

Please note that Platts' assessment for Iranian Light and Iranian Heavy effective December 13, 2011, through December 30 have been corrected to the following values.

These assessments appear in Platts Crude Oil Marketwire and Platts Global Alert, and in the Platts price database under codes AAGYB00, PCABH00, AAGXZ00, PCABI00.

Iranian Heavy 13-DEC-2011 -1.94/-1.90 106.88/106.93 14-DEC-2011 -1.99/-1.95 103.63/103.69 15-DEC-2011 -2.04/-1.98 102.52/102.59 16-DEC-2011 -2.16/-2.10 101.88/101.95 19-DEC-2011 -2.46/-2.40 101.52/101.59 20-DEC-2011 -2.50/-2.44 104.57/104.64 21-DEC-2011 -2.48/-2.42 105.05/105.12 22-DEC-2011 -2.60/-2.54 105.60/105.68 23-DEC-2011 -2.60/-2.54 105.11/105.18 28-DEC-2011 -2.45/-2.39 104.56/104.64 29-DEC-2011 -2.36/-2.30 104.20/104.27 30-DEC-2011 -2.31/-2.25 104.19/104.27

Iranian Light

13-DEC-2011 -0.09/-0.05 108.73/108.78 14-DEC-2011 -0.14/-0.10 105.48/105.54 15-DEC-2011 -0.19/-0.13 104.37/104.44 16-DEC-2011 -0.31/-0.25 103.73/103.80 19-DEC-2011 -0.61/-0.55 103.37/103.44 20-DEC-2011 -0.65/-0.59 106.42/106.49 21-DEC-2011 -0.63/-0.57 106.90/106.97 22-DEC-2011 -0.75/-0.69 107.45/107.53 23-DEC-2011 -0.75/-0.69 106.96/107.03 28-DEC-2011 -0.60/-0.54 106.41/106.49 29-DEC-2011 -0.51/-0.45 106.05/106.12 30-DEC-2011 -0.46/-0.40 106.04/106.12