U.S Auto Industry's Market Share and Fluctuations The U. S. auto industry's share of the market has experienced fluctuations over the past 50 years. These fluctuations have been caused by many reasons, but some of the main reasons include quality, price, and foreign competition. The Ford Motor Company, General Motors Company, and the Chrysler Corporation, a.k.a. "The Big Three", are the three largest manufacturers of automobiles in the world. " The Big Three" hold nearly 75% of the market and produce over 8 million automobiles per year. The largest competitors of " The Big Three" are Japanese auto producers that include Toyota, Nissan, and Honda. These three fo