Furloughing pilots is often a sign of operational or financial stress within an airline. This decision by Spirit Airlines could lead to negative perceptions among investors and the public, potentially affecting the company's stock price negatively in the short term. The high relevance score is due to the direct impact of this decision on the company's operations and workforce. The importance is significant as labor relations and operational efficiency are critical for airlines. The confidence level reflects the clear connection between labor issues and stock performance, although the exact impact can vary.