Other
The Online Investor: Mergers & Acquisitions
A day by day summary of all of the acquisitions and mergers of publically traded companies in the American business world.
US Department of Justice
U.s. Department of Justice: Vertical Merger Enforcement Policy
Read a 1995 speech given by Steven C. Sunshine, attorney in the Anti-Trust Division, which explains the differences between vertical and horizontal mergers.
Other
U.s. Securities and Exchange Commission: Mergers
A brief description of a merger, and what you can expect if a company that you have invested in is part of a merger.