United Airlines Holdings (NASDAQ:UAL) has outperformed the market over the past 15 years by 2.84% on an annualized basis producing an average annual return of 14.79%. Currently, United Airlines Holdings has a market capitalization of $18.76 billion. Buying $100 In UAL: If an investor had bought $100 of UAL stock 15 years ago, it would be worth $781.64 today based on a price of $57.06 for UAL at the time of writing. United Airlines Holdings’s Performance Over Last 15 YearsFinally — what’s the point of all this? The key insight to take from this article is to note how much of a difference compo…