Naira exchange rates: CBN To Raise Dollar Supply To BDCs To $40,000 Weekly In a bid to stabilize the Naira and influence the Naira exchange rates, the Central Bank of Nigeria (CBN) has made a resolution to increase the Dollar supply to the Bureau De Change (BDC) operators to $40,000 weekly, starting from next week. This increase is from the $20,000 it sold this week to the Dollar to Naira black market dealers.