Allegheny Energy Inc.'s (AYE) third-quarter profit fell 13% on hedging and debt-buyback costs as earnings topped analysts' expectations on higher margins.

Utilities have posted third-quarter results hurt by a cooler-than-expected summer, lower commodity prices and declining demand amid the economic downturn. Allegheny operates regulated electric utilities and merchant power plants that sell output at market prices rather than regulated prices.

Allegheny, which serves customers in some Mid-Atlantic states, reported earnings of $77 million, or 45 cents a share, down from $89 million, or 52 cents, a year earlier. Excluding the charges, earnings rose to 59 cents from 54 cents.

Revenue fell 6.6% to $793.7 million.

Analysts polled by Thomson Reuters had most recently forecast earnings of 53 cents on $952 million in sales.

Operating margin rose to 25.9% from 22% amid lower fuel costs.

Generation earnings, hurt by the weak economy and low power prices, fell 46%, while delivery and services earnings surged to $31.5 million from $4.3 million on increased rated in Virginia and the elimination of an intercompany transfer payment.

In September, Allegheny bought back about $150 million worth of notes that were due in 2011, the latest in a series of buybacks for the company. The company also issued about $600 million in senior notes to repay existing debt and buy back the aforementioned notes.

Shares closed at $25.02 Wednesday and didn't trade premarket Thursday. They are down 26% this year.

-By Nathan Becker, Dow Jones Newswires; 212-416-2855; nathan.becker@dowjones.com;