The Nigeria banks are not the only one with 25% loss of its market value... We are all impacted by the same parameter.
Everyone with savings, cash deposit and low-yield investment have lost 25% (a quarter) of it's monetary value.
So, if you have N40 million savings in banks it is currently worth only N30 million in purchasing power. A whooping 10 million have been eroded. A monumental loss!

The only people with a little saving grace are the commodity trader who can easily factor this inflation into their stock and reposition their asset.
This economic downturn is double tragedy and the odd is stacked more against the fixed income earner (e.g. salary earner, pensioner etc.) as this reality will be factored into business cost; as the price of goods and services (even rents) will rises.
Tough time indeed!