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The Alerian MLP Index is a composite of the 50 most prominent energy master limited partnerships calculated by Standard & Poor's using a float-adjusted market capitalization methodology. The index is disseminated by the New York Stock Exchange real-time on a price return basis (NYSE: AMZ). The corresponding total return index is calculated and disseminated daily through ticker AMZX.
More than 13 years of historical index data on both a price and total return basis is available beginning on December 31, 1995. Alerian also publishes relevant constituent data points such as index component weightings, total sector market capitalization, and dividend yield. Please read the Alerian MLP Index Methodology Guide v2.0 for index construction and maintenance regulations.