According to the agency, Electrolux, GE and Whirlpool manufacture 90 percent of the stoves and ovens sold to big builders and property managers in the U.S., and that the deal would help Electrolux and GE monopolize this market. However, Electrolux and GE are expected to argue that companies like Samsung and LG Electronics are also competing for market share in the U.S. The trial is set to begin Monday.