From Investopedia

By Ben McClure

It’s no secret that plenty of mergers don’t work. Those who advocate mergers will argue that the merger will cut costs or boost revenues by more than enough to justify the price premium. It can sound so simple: just combine computer systems, merge a few departments, use sheer size to force down the price of supplies and the merged giant should be more profitable than its parts. In theory, 1+1 = 3 sounds great, but in practice, things can go awry.

Historical trends show that roughly two thirds of big mergers will disappoint on their own terms, which means they will lose value on the stock market. The motivations that drive mergers can be flawed and efficiencies from economies of scale may prove elusive. In many cases, the problems associated with trying to make merged companies work are all too concrete.

Flawed Intentions

For starters, a booming stock market encourages mergers, which can spell trouble. Deals done with highly rated stock as currency are easy and cheap, but the strategic thinking behind them may be easy and cheap too. Also, mergers are often attempt to imitate: somebody else has done a big merger, which prompts other top executives to follow suit.

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