Alerian Announces Niska Gas Storage Partners Added to the Alerian MLP Index

DALLAS, Dec. 15, 2010 /PRNewswire/ -- Alerian announced today that following the close of business on Friday, December 17, Niska Gas Storage Partners LLC (NYSE: NKA) will be added to the Alerian MLP Index (NYSE: AMZ).

Niska is the largest independent owner and operator of natural gas storage in North America, with strategically located assets in key natural gas producing and consuming regions.

NKA Shares Outstanding: 67,609,490

NKA Investable Weight Factor: 0.253662614523494

Dorchester Minerals LP (Nasdaq: DMLP) will be removed from the index following the close of business on December 17. In addition, the 50 constituents of the index will be rebalanced on a float-adjusted, capitalization-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 MLP Index

The Alerian MLP Index is a composite of the 50 most prominent energy Master Limited Partnerships that provides investors with an unbiased, comprehensive benchmark for this emerging asset class. The index, which is calculated using a float-adjusted, capitalization-weighted methodology, is disseminated real-time on a price-return basis (NYSE: AMZ) and a total-return basis (NYSE: AMZX). Relevant data points such as dividend yield are also published daily. For index values, constituents, and announcements regarding constituent changes, 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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