The charts below show the stock price of The Boeing Company compared to other aerospace companies, the S&P 500 Index and the S&P 500 Aerospace and Defense index. Prices are plotted as an index number. The base date for these prices is April 1, 2001, and equals 100. For example, an index of 120 represents a 20 percent improvement over the baseline. Each data point represents the end of a trading week.