Corrections for June 17, 2011

The following corrections were made on June 17, 2011

Symbol
Assessment Date
Original Assessment
New Assessment
Description

AAEUQ01c 01-Jan-11 106.77 106.8 OPEC Basket YTD MovAvg

AAEUQ03c 01-Jun-11 111.9 111.7 OPEC Basket MTD MovAvg

AAEUQ04c 17-Jun-11 113.18 112.27 OPEC Basket WTD MovAvg

AARWE00h 17-Jun-11 -2.97 -3.01 ESPO Diff vs Dtd Brent

AARWE00l 17-Jun-11 -2.99 -3.03 ESPO Diff vs Dtd Brent

PMABY05h 17-Jun-11 235.6 234.6 NatGas Mt Belv Non-Targa Pipe