Microsoft is the most valuable company in the world and shows no signs of slowing down.Created in 1896, the Dow Jones Industrial Average is one of the best-known U.S. indexes. It is price-weighted, meaning its 30 components are weighted based on their stock prices rather than their market caps. This means that stock splits can have a major impact on the Dow.Microsoft (MSFT -0.25%), UnitedHealth Group (NYSE: UNH), and Goldman Sachs Group (NYSE: GS) are the three largest Dow components and all trade at over $ ...