In special rebalancings of Alerian indexes, MPLX LP (NYSE: MPLX) is expected to be added to the Alerian Natural Gas MLP Index (NYSE: ANGI), the Alerian MLP Infrastructure Index (NYSE: AMZI), and the Alerian Energy Infrastructure Index (CME: AMEI), replacing MarkWest Energy Partners (NYSE: MWE) in all three indexes.
Special rebalancings are triggered by corporate actions that result in the termination of trading of an index constituent on a major US exchange. Such corporate actions include, but are not limited to, mergers, delistings, and bankruptcies. Pending unitholder approval, MWE will cease to trade on the NYSE due to its merger with MPLX.
If approved, the rebalancings will take place one full trading session after the constituent's issuance of a press release indicating all needed merger votes have passed.
MPLX owns, operates, develops, and acquires pipelines and other midstream assets related to the transportation and storage of crude oil, refined products, and other hydrocarbon-based products.