What term describes illegal acts intended to create unreasonable restraint of trade or a monopoly in the insurance business?

The term that accurately describes illegal acts intended to create unreasonable restraint of trade or a monopoly in the insurance business is "boycott." A boycott involves a collective refusal to deal with or do business with a certain entity or individual, often as a way to exert economic pressure. In the context of insurance, this can manifest through insurers or agents agreeing not to sell or provide services to certain clients or sectors, ultimately restricting competition and creating monopolistic behavior.

While coercion refers to forcing someone to act in a certain way through threats or pressure, and fraud entails deceit or misrepresentation for personal gain, these do not specifically address the concept of restraining trade or creating monopolies. Collusion, on the other hand, often involves secret or illegal cooperation to deceive or defraud others but does not inherently carry the connotation of a collective refusal to engage in business as a boycott does. Thus, "boycott" is the most appropriate term to describe these illegal acts within the insurance field.