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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 Constituents15
Market Capitalization$217 billion
Adjusted Market Capitalization$120 billion
RebalancingsQuarterly

Index Yield

Top 10 Constituents

ConstituentsSectorTickerPriceYieldMarket Cap (M)Index Weight
Plains All American Pipeline LPPipeline Transportation | PetroleumPAA$10.436.9%$8,33610.7%
Energy Transfer LPPipeline Transportation | Natural GasET$10.726.5%$28,89910.6%
Magellan Midstream Partners LPPipeline Transportation | PetroleumMMP$49.398.4%$11,11610.5%
MPLX LPPipeline Transportation | PetroleumMPLX$30.319.3%$32,09110.3%
Western Midstream Partners LPGathering & ProcessingWES$24.635.3%$10,93610.1%
Enterprise Products Partners LPPipeline Transportation | Natural GasEPD$25.467.3%$55,6539.5%
EnLink Midstream LLCGathering & ProcessingENLC$9.484.8%$5,2938.9%
DCP Midstream LPGathering & ProcessingDCP$33.224.7%$6,9217.7%
Cheniere Energy Partners LPLiquefactionCQP$46.796.0%$22,6475.4%
Crestwood Equity Partners LPGathering & ProcessingCEQP$26.109.6%$1,9104.6%

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: 11/18/22

Market Data

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