For all you guys in the diaspora fixing money in banks,there is a better option of fixing your money with the established asset management companies or finance houses,some of which are subsidiaries of banks and guarantee safety of your funds,for the amounts being branded here 10m above you can get rates matching the treasury bill rate of about 13%(was much higher until recently).I would not be giving you names of companys (its better you do your research yourselves)`.Money market investments is the in thing in Nigeria now that the stock market is floundering.
NB.This is from someone who worked in the industry for over a decade but recently pulled out to pursue other interests

I am getting 7% on my investment. You should have held your account officer by the balls. They need your money to stay in the system. Na negotiation. And of course, you need to be physically present.