Hello everyone this is Dr Zhao in this video, we should perform an enterprise diagnosis on American Airlines by comparing it to its major competitors side-by-side to discover its strength and weakness. Searching American Airlines on the navigator and specifying the filter of country to the United States, then we can zoom in on the node of sub-industry "airlines" to bring out more details on the competitors. We should compare American Airlines to Delta, United, Southwest and Alaska Airlines. In this video, we try to answer two questions, first, relative to competitors, what are my strengths and weaknesses? And second, how do my strengths and weaknesses change over time? We first compared these companies by size by selecting the size analysis module in enterprise comparison. We can see that in the year 2019 American Airlines, in red, has the revenue and gross profit comparable to its largest competitors such as Delta Airlines and United Airlines, but the net income and profit before tax smaller than all others except the smallest competitor, Alaska Airlines. We also compared these companies on profitability by examining their growth margin, operating margin, net margin and return on assets. We can see that American Airlines, in red, is the worst in almost all dimensions and Southwest, in orange, is the best. Now let's take the perspective of investors, by comparing these companies on their return on equity, return on assets, and return on invested capital. We find that American Airlines, in red box, has the smallest investment returns among all competitors. But Southwest, in blue box, performed the best. In fact, American Airlines' equity in 2019 is negative and so there is no return on equity calculated for American Airlines in this year. These observations are consistent to the stock prices of these companies and explained the investors actions. In summary, American Airlines is strong in size, in revenue and assets, but weak in return on assets, profitability and financial health. The question is, how did American Airlines come down to this stage? For American Airlines and selected competitors, we did an enterprise trend analysis first on size, which shows the total revenue and operating incomes of these companies Overtime. You can see that over the period between 2015-2019, although the total revenues were slightly increasing for all these companies, all operating incomes are declining and the American Airlines, in blue, had the sharpest decline. In fact, American Airlines had the highest operating income in 2015, but afterwards it was going straight down. A look at the enterprise trend on financial health may shed some insights. We find that their liability asset ratios are high but stable and American Airlines has the highest liability asset ratio constantly during these years and approaching and exceeding one recently, which is the danger zone. American Airlines, in blue, also has a significant long-term debt ratio, much higher than everybody else. To wrap up, just like Roman is not built in one day, American Airlines' decline took years, over this time high liabilities and low profitability were built up gradually, mistakes were made constantly, then led to the company's current situation.