The naira exchanged to the dollar in the parallel market at N474/$ on Thursday.
The naira had recorded slight improvement in recent days.
It closed at the Importer & Exporter forex window at N394.6/$.
However, the Central Bank of Nigeria retained the official exchange rate at N379/$ according to its website.
The Bureau De Change operators had attributed fluctuations the naira is experiencing to speculative activities of some operators.
