While the Missouri Public Service Commission approved a $163 million rate increase for AmerenUE on Tuesday, it wasn’t immediately clear when the new rates would take effect.

This afternoon, AmerenUE said it a SEC filing that the increase is expected to be effective March 1,…

Standard & Poor’s lifted its credit ratings for Ameren Corp.’s Illinois utilities to investment grade on Thursday, just days ahead of a possible decision by regulators on a request to raise electric and gas rates by $207 million.

The ratings for AmerenIP,…

Some AmerenUE residential customers received a e-mailed letter from utility Chief Executive Thomas R. Voss warning of a coming rate increase request. And, no, it wasn’t an April Fool’s joke.

An electronic copy of the letter was sent to Ameren’s eNews electronic newsletter this afternoon. All customers should…

The Missouri Public Service Commission voted 4-1 Thursday approving rules that may allow electric utilities to impose a customer surcharge to recover environmental expenses, PSC spokesman Kevin Kelly said.

Commissioner Robert Clayton III voted against the rules, which will take effect…