Explanation

The major merger waves in the United States are-

In 1900, horizontal mergers resulted in creating monopolies majorly in the oil and steel industries.
In the 1920s, congeneric mergers created oligopolies and vertically integrated supply chains.
In the 1960s, conglomerates were created.
In the 1980s, hostile takeovers and generic mergers.
In the 1990s, the deregulation of once-sheltered industries led to cross-border mergers creating multinational corporations.

Verified Answer

The major merger waves that have occurred in the United States are-

In 1900, horizontal mergers.
In the 1920s, congeneric mergers.
In the 1960s, conglomerates.
In the 1980s, hostile takeovers and generic mergers.
In the 1990s, due to the deregulation of once-sheltered industries.