Union Pacific Corporation (UNP) issued a regulatory filing ahead of its investor day event on Sept. 19. In the filing, management stated that the company expects its revenues (excluding those from fuel surcharge) to grow faster than volumes (excluding coal) in the next three years, outpacing the markets served by the railroad operator. UNP expects to maintain an industry-leading operating ratio (operating expenses as a % of revenues) in the next three years with the help of high revenues. We should note tha ...