The European Commission said on Tuesday it had fined Mastercard 570.6 million euros ($648.3 million) for limiting the possibility for merchants to benefit from better conditions offered by banks elsewhere in the European Union.

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“By preventing merchants from shopping around for better conditions offered by banks in other member states, Mastercard’s rules artificially raised the costs of card payments, harming consumers and retailers in the EU,” European Competition Commissioner Margrethe Vestager said in a statement.

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