The idea of anti-trust regulation is to break up companies that cornered a market, that is, (mostly) prevented competition on it. Breaking them up serves to make more, smaller companies (out of the split giant) that would start to compete again.
Anti-trust laws can be seen as pro-market laws that try to prevent long periods of monopolized markets without waiting for a naturally occurring disruption, instead providing a mandated disruption.
Whether it's _efficient_, and whether it works as intended, can be discussed.
The idea of anti-trust regulation is to break up companies that cornered a market, that is, (mostly) prevented competition on it. Breaking them up serves to make more, smaller companies (out of the split giant) that would start to compete again.
Anti-trust laws can be seen as pro-market laws that try to prevent long periods of monopolized markets without waiting for a naturally occurring disruption, instead providing a mandated disruption.
Whether it's _efficient_, and whether it works as intended, can be discussed.