According to an analyst update from Dahlman Rose & Co., American Airlines and US Airways are expected to announce a merger this week. The ownership of the combined company, which would generate $38 billion in revenues, is to include a 72 percent stake for creditors of American’s parent company. US Airways shareholders would take the remaining 28 percent. The combined company would be valued at $8.5 billion, which a number analysts see as too high. “We...