Alerian Announces Additions to the Alerian Natural Gas MLP Index

DALLAS, June 15, 2011 /PRNewswire/ -- Alerian announced today that following the close of business on Friday, June 17, Chesapeake Midstream Partners LP (NYSE: CHKM), Crestwood Midstream Partners LP (NYSE: CMLP), Exterran Partners LP (NASD: EXLP), Niska Gas Storage Partners LLC (NYSE: NKA), and PAA Natural Gas Storage LP (NYSE: PNG) will be added to the Alerian Natural Gas MLP Index (NYSE: ANGI).

Following the close of business on June 17, the index will consist of 20 constituents, which will be rebalanced on an equal-weighted basis in accordance with the existing index methodology. Constituent additions to and deletions from the index do not reflect an opinion by Alerian on the investment merits of the respective securities.

About the Alerian Natural Gas MLP Index

The Alerian Natural Gas MLP Index is an equal-weighted composite of 15 natural gas infrastructure Master Limited Partnerships. The index, whose constituents earn the majority of their cash flow from the transportation, storage, and processing of natural gas and natural gas liquids, provides investors with an unbiased benchmark for the infrastructure component of the natural gas industry. The index is disseminated real-time on a price-return basis (NYSE: ANGI), and the corresponding total-return index is disseminated daily through ticker ANGIX. For index values, yields, constituents, and announcements regarding rebalancings, please visit www.alerian.com.

About Alerian

Alerian is an independent company that provides objective market information. The company is a leader in MLP-market intelligence, providing benchmarks, data sets, and analytics that are used extensively by a range of stakeholders such as investment banks, stock exchanges, investment professionals, consultants, and Master Limited Partnerships. The Alerian Index Series is used for the purposes of asset allocation, investment analysis, portfolio hedging, and the creation of index tracking funds. Alerian is widely known for maintaining the leading benchmark of MLP equities: the Alerian MLP Index (NYSE: AMZ). For more information, please visit www.alerian.com.

SOURCE Alerian

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