(In U.S. dollars unless noted.)
July 25 (Reuters) - Encana Corp, which faces antitrust investigations following a Reuters report that it colluded with Chesapeake Energy Corp to lower the price of Michigan exploration lands, reported a second-quarter net loss on Wednesday because of a large one-time asset impairment charge.
The company, Canada's largest natural-gas producer, reported a net loss of $1.5 billion, compared with a year-earlier profit of $383 million.
Operating income, which excludes most one-time items, fell 44 percent to $198 million, or 27 cents a share, from $352 million, or 48 cents a share.
Reporting by Euan Rocha in Toronto and Scott Haggett in Calgary