Shares of the second-largest airline fell almost 10 percent Thursday after reporting mixed earnings results. United reported a loss of $609 million, widening from $417 million a year earlier, and said canceled flights because of severe winter storms alone cut $200 million from the quarter’s bottom line. Marc Lichtenfeld believes the results in the first quarter were absolutely terrible. They lost a ton of money even when you take out the weather-related issues. In fact, every important metric was down.