Abuja - Nigeria's excess crude account (ECA), where it saves oil export earnings over a benchmark price, contains $4.3 billion, Finance Minister Ngozi Okonjo-Iweala said on Monday.
The Finance Ministry said it had $9 billion in accumulated oil savings as of last December. The accountant general said the ECA held $5.1 billion on August 23.
Nigeria is becoming increasingly attractive to portfolio investors, but they often worry about the government's tendency to squander its oil windfall.
Oil revenues from Nigeria have been hit by persistent oil theft and pipeline outages this year.