Platts to update Mexico OSP, postings data codes

Platts will change the description of market data symbols found in Latin America Crude Postings (CA) category and move this data into the Official Selling Price (OS) category of Platts' database services.

This change is scheduled to take effect May 1, 2011.

CHANGE FROM: CA AAIRM00 Maya Pemex 1st Mth MAvg CA AAIRN00 Olmeca Pemex 1st Mo MAvg CA AAISC00 Isthmus Pemex 1st Mo MAvg CA AAYXE00 Maya-Europe $/Bbl CA AAYXF00 Isthmus-Europe $/Bbl CA AAYXG00 Maya-Far East $/Bbl CA AAYXH00 Isthmus-Far East $/Bbl CA PDATO09 Isthmus Pemex 1st Mth Source CA PDATS09 Maya Pemex 1st Mth Source CA PDATT09 Olmeca Pemex 1st Mth Source

CHANGE TO: OS AAIRM00 Maya OSP (Mexico to Americas) OS AAIRN00 Olmeca OSP (Mexico to Americas) OS AAISC00 Isthmus OSP (Mexico to Americas) OS AAYXE00 Maya Posting (Europe) OS AAYXF00 Isthmus Posting (Europe) OS AAYXG00 Maya Posting (Asia) OS AAYXH00 Isthmus Posting (Asia) OS PDATO09 Isthmus Posting (Americas) OS PDATS09 Maya Posting (Americas) OS PDATT09 Olmeca Posting (Americas)