China’s central bank has suspended at least three foreign banks from conducting some foreign exchange business until the end of March, three sources who had seen the suspension notices told Reuters on Wednesday. The sources, speaking on condition that the banks were not named, said the notices sent to the affected foreign banks by the People’s Bank of China (PBOC) gave no reason for the suspension. “This is part of the PBOC’s expedient means to stabilize the yuan’s exchange rate,” said an executive at a foreign bank contacted separately.