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Alerian MLP Infrastructure Index

The Alerian MLP Infrastructure Index is a composite of energy infrastructure Master Limited Partnerships (MLPs). 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 (AMZI) and on a total-return basis (AMZIX).


Index Characteristics

Index Symbol (Price Return)AMZI
Index Symbol (Total Return)AMZIX
Number of Constituents21
Market Capitalization$142 billion
Adjusted Market Capitalization$79 billion
RebalancingsQuarterly

Index Yield

Top 10 Constituents

ConstituentsSectorTickerPriceYieldMarket Cap (M)Index Weight
MPLX LPGathering & Processing MPLX$19.7213.7%$20,87112.5%
Magellan Midstream Partners LPPipeline Transportation | PetroleumMMP$44.369.2%$10,13210.7%
Enterprise Products Partners LPPipeline Transportation | Natural GasEPD$18.689.5%$40,77210.3%
Energy Transfer LPPipeline Transportation | Natural GasET$8.2014.9%$22,0889.1%
Phillips 66 Partners LPPipeline Transportation | PetroleumPSXP$44.587.8%$10,7619.0%
Plains All American Pipeline LPPipeline Transportation | PetroleumPAA$9.7514.8%$7,7918.6%
TC PipeLines LPPipeline Transportation | Natural GasTCP$34.947.4%$2,4915.2%
Shell Midstream Partners LPPipeline Transportation | PetroleumSHLX$13.3613.3%$3,1174.8%
EQM Midstream Partners LPPipeline Transportation | Natural GasEQM$18.9924.4%$3,8074.6%
Western Midstream Partners LPGathering & Processing WES$8.9827.6%$4,0684.3%

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 MLP Infrastructure 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

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