Naira on Thursday fell further by 1.68 per cent against the dollar at the official market.
At the Investor & Exporter foreign exchange window, the local currency opened at 413.15/$1 on Thursday but closed at 422.07/$1.
The naira had depreciated by 0.19 per cent to 415.10/$1 on Wednesday after closing at 414.30/$1 on Tuesday.
At the parallel market, the dollar was bought at N565 and sold for N570, according to some operators in the black market.
The Central Bank of Nigeria, however, maintained N410.91/$1 as its official rate on its website.