Switzerland's competition watchdog said on Monday it had opened an investigation into several Swiss, British and American banks over possible collusion to manipulate foreign exchange rates.
Credit Suisse said it was "astonished" to be drawn into the Swiss competition probe.
"Credit Suisse AG was not the subject of the preliminary investigation carried out by the competition commission into various banks," the Swiss bank said in a statement.
"The press release contains incorrect references to Credit Suisse AG and these allegations are both inappropriate and harmful to our reputation."
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