Dive Brief: Utilities pursuing a centralized energy exchange market in the Southeast on Monday night filed an updated proposal with federal regulators, in an effort to provide more transparency on how the plan would work. Duke Energy, Southern Company, the Tennessee Valley Authority and others are attempting to create a Southeast Energy Exchange Market (SEEM) that would extend the Southeast's current bilateral market, creating a 15-minute energy exchange intended to more efficiently use existing transmission. But the Federal Energy Regulatory Commission raised a number of questions over the proposal last month, and asked the utilities to come back with more details on how the market would improve existing energy transactions in the region, and to provide more transparent details on the proposal.