The Missouri Public Service Commission carved out the whole week to take testimony and evidence in a rate case that accuses Ameren Missouri of earning more profit than regulators allow. Consumer groups led by Noranda Aluminum, the largest electric consumer in the state, will argue that the percentage return regulators do allow — the most important number for utilities and their consumers — is too high and should be reduced.
For customers, it won’t make a significant difference to their bills. The latest testimony from PSC staff says Ameren earned about $25 million more than it should have during 2013. Spread that over 1.2 million customers, and it’s not much.