ComparetheMarket fined £17.9m for most-favoured-nation clauses

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The UK Competition and Markets Authority recently fined ComparetheMarket.com £17.9m for its use of most favoured nation (MFN) clauses in contracts with insurers that sold their products via ComparetheMarket.com.
An MFN clause usually requires one party to agree not to offer better terms/prices to third parties than those it has agreed with the other party to the contract. The CMA considered that ComparetheMarket's MFN clauses meant insurers could not offer cheaper deals on competing price comparison websites.
The CMA concluded that the MFN clauses breached competition law on the basis that:
The CMA has fined only ComparetheMarket and not the insurers who were party to the agreements containing the MFNs.
ComparetheMarket also refused to remove its wide MFNs from its contracts despite numerous requests from insurers
https://www.gov.uk/government/news/cma-fines-comparethemarket-17-9m-for-competition-law-breach