The underlying index for two popular energy infrastructure ETPs has changed following a recent consultation with stakeholders. VettaFi has announced an updated methodology for the Alerian MLP Infrastructure Index (AMZI), tracked by the Alerian MLP ETF (AMLP) and the ETRACS Alerian MLP Infrastructure Index ETN Series B (MLPB), increasing the maximum weight a single constituent can be [...] The post AMLP and MLPB Underlying Index Methodology Changes appeared first on ETF Trends .