Naira crashed further against dollar from 247 last thursday to 251 on saturday at the parallel market.
This came barely one week after the central bank of Nigeria cut the foreign exchange supply to bureau de change operators.
The central bank had during its weekly forex sale to the BDCs last wednesday refused to sell forex to operators that failed to render returns on the utilisation of previous forex bought at the official window.
The dollar was selling for between N241 and N243 before Wednesday's decision. The local currency was still 197 against the dollar at the official market.
Meanwhile the nation's foreign currency reserves dropped to $29.7bn on December 3 2015, data from the CBN's website showed on Sunday.
Thisb is expected to put more pressure on the CBN's bid to defend the naira and avoid a devaluation of the local currency.
The gross foreign exchange reserve has dropped to $29.92bn on November 30,the first time they fell below $30bn since July 13.