ST. LOUIS, Mo. -- Ameren Corporation says lower power prices and higher fuel costs contributed to a net loss last year of 974 million dollars.
The loss compares to a net income of 519 million dollars for 2011.
The Company says the decrease results from a lower allowed return on equity, due to low Treasury bond yields, and required non-recoverable program donations.
Ameren says there were other factors related to last year's implementation of formula ratemaking for electric delivery service.