Answer: Market Allocation.
Explanation: Market Allocation could be regarded as being illegal as it results when companies within the same market seems to come together or reach a compromise on severing the market between themselves. In most cases this agreement is aimed at promoting monopoly, increase the market power of the firms hence leading higher prices properties and goods. In the scenario above, the agreement between bearcat and knight reality about the type of listing each company should offer exhibits an antitrust action of market allocation which could foster monopoly by increase the firms dominance by reducing competition and ultimately overburden consumers.