In recent years the Value at Risk (VaR) concept for measuringdownside risk has been widelystudied. VaR basically is a summary statistic that quantifies theexposure of an asset or portfolio tomarket risk, or the risk that a position declines in value withadverse market price changes. Threeparties...

Purpose: COVID-19 caused a highly uncertain environment and introduced a radical change in the airline industry. In that time, idle capacity due to drastic decline in passenger traffic, change in travel rules, and increases in air cargo demand have emerged as the main challenges. Effective...