AMUB tracks a market cap-weighted index of the 50 publicly traded MLPs, selected by distributions. The note launched on Oct. 9, 2015 as a B Series companion to AMU, providing more capacity for exposure to the same index. AMUB (and AMU) are alternatives to AMJ, another ETN that tracks the same index but that is currently closed for creations. Since AMUB is an ETN, holders of the note do not have any implied ownership of individual MLPs. Also, AMUB's distributions will be taxed as ordinary income. The loss of tax deferment and counterparty risk are trade-offs for tax simplicity.