Why is the ninth month called September?
Laws passed in the United States, especially between 1890 and 1915, to prevent large business corporations, called trusts, from combining into monopolies to restrict competition. The laws were instituted to encourage free enterprise. (See also trust busting.)
Note: The enforcement of antitrust laws has been inconsistent.
Note: Although the Bell Telephone system was declared a monopoly and forced to break up, huge corporations continue to merge.