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Libor Probe Said to Expose Collusion, Lack of Internal Controls

Global regulators have exposed flaws in banks’ internal controls that may have allowed traders to manipulate interest rates around the world, two people with knowledge of the probe said.

Investigators also have received e-mail evidence of potential collusion between firms setting the London interbank offered rate, said the people, who declined to be identified because they weren’t authorized to speak publicly. Regulators are focusing on a lack of so-called Chinese walls between traders and employees making interest-rate submissions on behalf of their banks, the people said. In some cases, the two groups may have sat close to each other, one person said.