Edison International said on Friday that its second-quarter earnings more than doubled, helped by lower taxes and better margins compared to a year ago.

The Rosemead-based electric utility on Friday reported net income rose 180 percent to $261 million, or 79 cents per share. The year-ago quarter had been hurt by charges from early debt extinguishment. Revenue was up 11 percent to $3.38 billion.

Analysts had expected adjusted profit of 75 cents per share on revenue of $3.25 billion, according to a poll by Thomson Financial.

The company said this year’s second quarter was helped by lower taxes at Southern California Edison, and higher gross margins at Edison Mission Group power plants in the Midwest.

The company reaffirmed its 2008 earnings forecast of $3.61 to $4.01 per share.

Edison shares were up 35 cents, or 1 percent, to $46.80 in mid-morning trading on the New York Stock Exchange, after earlier falling 66 cents.