Which of the following practices is a violation of anti-trust law in real estate?

Price fixing in the market is indeed a violation of anti-trust law in real estate. Anti-trust laws are designed to promote competition and prevent monopolies or collusion that can lead to unfair market practices. When real estate professionals agree to set fixed commission rates or manipulate pricing structures, it reduces competition and can harm consumers by keeping prices artificially high.

This practice undermines the free market system that is intended to allow consumers to benefit from a variety of choices and competitive pricing. By agreeing to fixed prices, real estate agents limit their ability to negotiate, which can ultimately diminish consumer choice and lead to less favorable conditions for those seeking real estate services.

In contrast, offering competitive commission rates encourages healthy competition among agents, allowing consumers to benefit from a range of services and pricing. Similarly, advertising properties for sale and partnering with other agencies are both standard practices that help increase property visibility and foster business relationships without infringing upon fair market competition.