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Alerian US Midstream Energy Index

The Alerian US Midstream Energy Index is a broad-based composite of US energy infrastructure companies. The capped, float-adjusted, capitalization-weighted index, whose constituents earn the majority of their cash flow from midstream activities involving energy commodities, is disseminated real-time on a price-return basis (AMUS) and on a total-return basis (AMUSX).


Index Characteristics

Index Symbol (Price Return)AMUS
Index Symbol (Total Return)AMUSX
Number of Constituents41
Market Capitalization$243 billion
Adjusted Market Capitalization$166 billion
RebalancingsQuarterly

Index Yield

Top 10 Constituents

ConstituentsSectorTickerPriceYieldMarket Cap (M)Index Weight
Energy Transfer LPPipeline Transportation | Natural GasET$8.2014.9%$22,08810.5%
The Williams Companies IncGathering & Processing WMB$19.657.7%$23,8179.7%
ONEOK IncGathering & Processing OKE$36.2010.1%$14,9549.5%
Enterprise Products Partners LPPipeline Transportation | Natural GasEPD$18.689.5%$40,7729.3%
Cheniere Energy IncLiquefactionLNG$45.860.0%$11,6839.2%
Kinder Morgan IncPipeline Transportation | Natural GasKMI$15.416.5%$34,9038.8%
Magellan Midstream Partners LPPipeline Transportation | PetroleumMMP$44.369.2%$10,1328.4%
MPLX LPGathering & Processing MPLX$19.7213.7%$20,8716.3%
Plains All American Pipeline LPPipeline Transportation | PetroleumPAA$9.7514.8%$7,7913.4%
Targa Resources CorpGathering & Processing TRGP$18.0420.2%$4,1993.1%

Sector Weightings


The accuracy and/or completeness of any Alerian index, any data included therein, or any data from which it is based is not guaranteed by Alerian, and it shall have no liability for any errors, omissions, or interruptions therein. Alerian makes no warranties, express or implied, as to results to be obtained from use of information provided by Alerian and used in this service, and Alerian expressly disclaims all warranties of suitability with respect thereto. The Alerian US Midstream Energy Index is the exclusive property of Alerian, which has contracted with Standard & Poors ("S&P") to maintain and calculate the Index. S&P shall have no liability for any errors or omissions in calculating the Index.

Last Updated: 05/15/20

Market Data

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