Late in November, Spirit Airlines (SAVE), a low-cost carrier operator, hinted that its fourth-quarter revenues could grow at a higher rate than previously projected. The costs could be lower than previously expected. In an SEC filing on November 26, Spirit Airlines revealed that it increased the guidance for one of its key revenue metrics, which we’ll discuss in this part. The company has reduced the growth expectations for a key cost metric. The company’s stock gained more than 15% during trading on November 27 due to the upbeat outlook.