1. Find the Price/Earnings ratio for the stocks of Apple, Ford Motor, and General Motors (again, Yahoo Finance is a good place to find this, among others; use the "Trailing P/E"). What might explain differences between the P/E ratio for Apple and the two automotive companies? What might explain the differences between the P/E ratio for Ford and GM?
2. Suppose GM or Ford were to announce they have perfected an autonomous car and would introduce it by next January 1. What would you expect to happen to the P/E ratio and why?