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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 Constituents46
    Market Capitalization$381 billion
    Adjusted Market Capitalization$268 billion
    RebalancingsQuarterly

    Index Yield

    Top 10 Constituents

    ConstituentsSectorTickerPriceYieldMarket Cap (M)Index Weight
    Kinder Morgan IncPipeline Transportation | Natural GasKMI$22.144.5%$50,14611.1%
    ONEOK IncGathering & Processing OKE$77.064.8%$31,83210.7%
    Energy Transfer LPPipeline Transportation | Natural GasET$12.1410.1%$32,70110.6%
    Enterprise Products Partners LPPipeline Transportation | Natural GasEPD$25.956.8%$56,6409.8%
    The Williams Companies IncGathering & Processing WMB$21.527.1%$26,0839.3%
    Cheniere Energy IncLiquefactionLNG$53.690.0%$13,6786.8%
    Magellan Midstream Partners LPPipeline Transportation | PetroleumMMP$60.456.8%$13,8076.7%
    MPLX LPGathering & Processing MPLX$23.2511.7%$24,6074.6%
    Targa Resources CorpGathering & Processing TRGP$39.149.3%$9,1114.1%
    Plains All American Pipeline LPPipeline Transportation | PetroleumPAA$15.849.1%$12,6583.7%

    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: 02/14/20

    Market Data

    Alerian’s indexes are widely used by financial firms, industry stakeholders and professionals to support a variety of business functions. Alerian offers a range of end-of-day and historical index data subscriptions.

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