	nigerian currency firms at latest auction the nigerian naira firmed pct against the dollar after banks were disqualified from bidding at today s weekly foreign exchange auction the central bank said the naira finished at to the dollar against last week only mln dlrs of the mln dlrs on offer was sold with all bidding banks successfully obtaining hard currency the effective rate including a central bank levy for transactions in the coming week was against last week the failure to sell the whole allocation was due to the central bank s unprecedented disqualification of banks as punishment for inadequate documentation in previous transactions banks are required to submit proof that their bids are based on valid commercial transactions and the central bank has complained in the past that many are failing to produce the right paperwork within the specified time reuter 
