Because monopolies were taking most of the money in the stocks, and because one person owned many companies, Theodore Roosevelt made the Sherman Anti-Trust Act to make it so that one person didn't get all of the money. Roosevelt was then named the "Trust Buster" after it was made.
The Sherman Anti-Trust Law which was meant to regulate interstate commerce. A trust is when stock holders in several companies transfer all of their shares to one single trustee.These trusts began to dominate major industries and destroyed the competition. The law was not perfect as it was not worded perfectly, but it was a start to regulating this issue in our country.
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The Sherman Anti-Trust Act had 5 reason on why it was made.
To respond to the public outcry against monopolies and their damaging effect on prices and therefore consumers and suppliers.
To reduce the power of the Robber Barons.
To regain a balance in industry allowing equal opportunities to all businesses.