Visa's payment system will not be able to acquire the Mexican company Prosa after a decision by the country's national antitrust authorities. According to Bloomberg, this decision marks the first major act by Mexico's newly established antitrust agency. The deal's blocking reflects increased control over competition in the payment industry — regulators feared that the merger of the two companies could lead to excessive market concentration. This action by Mexico demonstrates the government's serious approach to protecting free competition in the financial sector and could serve as a benchmark for other cross-border deals in the region.