For a mono - product economy like ours, it is not unprecedented, therefore, that a
sudden and sustained
decline in the price of the product will impact the country's
revenue negatively.
For example, if an organization faces a
sudden decline in business or
revenue due to political, economic or any other reasons, the authorities responsible for assigning bond investment - grade scores won't be able to pick the downfall and may be late
in updating their investment grade.