The Tenth Circuit affirmed summary judgment dismissing a Complaint brought by an owner of a  windshield repair shop alleging State Farm’s policy that advises its insureds to replace (rather than repair) windshields with cracks longer than six inches violates Sections 1 and 2 of the Sherman Act and the Colorado Consumer Protection Act. Campfield v. State Farm Mutual Automobile Insurance Co., Nos. 06-1442, 06-1467, 06-1469, 2008 WL 2736656 (10th Cir. July 15, 2008). The Court rejected plaintiff’s Section 1 and 2 claims because he could not establish a relevant product market — a necessary element of both claims. The Court noted that plaintiff alleged State Farm’s misuse of its monopsony power over its insured and therefore the relevant market “is not the market of competing sellers but of competing buyers. This market is comprised of buyers who are seen by sellers as being reasonably good substitutes.” Id. at *4 (citation omitted). Plaintiff alleged a “State Farm insured repairable windshield market, in the geographic area of the United States of America.” Id. The Tenth Circuit rejected this market definition as underinclusive because plaintiff offered no basis why sellers would not view other buyers of repairable windshields as reasonable substitutes. The Tenth Circuit made clear that the rule of reason applied to the Section 1 claim notwithstanding plaintiff’s characterization of State Farm’s conduct as a group boycott. The restraint was vertical in nature and not the classic horizontal group boycott that triggers per se condemnation. The Tenth Circuit rejected the Consumer Protection Act claim because the recommendations to insureds to replace rather than repair windshields were not knowing and intentional concealment or misrepresentations as required under the Act. This opinion is useful for its discussion of limitations on pleading relevant markets as well as the relevant market inquiry in monopsony cases.