DALLAS, Dec. 18, 2012 /PRNewswire/ -- Alerian announced that following the close of business on Friday, December 21, PVR Partners L.P. (NYSE: PVR) will be added to the Alerian Natural Gas MLP Index (NYSE: ANGI).

PVR Partners owns and operates a network of natural gas midstream pipelines and processing plants in Texas, Oklahoma, and Pennsylvania. PVR also owns and manages coal and natural resource properties.

Crestwood Midstream Partners L.P. (NYSE: CMLP) will be removed from the index following the close of business on December 21. In addition, the 20 constituents of the index 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 20 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. Over $10.5 billion is directly tied to Alerian's indices, including the leading benchmark of MLP equities: the Alerian MLP Index (NYSE: AMZ). For more information, please visit www.alerian.com.

SOURCE Alerian