As an “immature creditor-lender,” the trade balance and current account are in surplus as well; as a “mature creditor-lender,” the trade balance returns to deficit; finally, as a “creditor-borrower,” the country’s current account swings into deficit. A country in the later stages of development can use investment income from its past accumulation of net foreign assets to compensate for the decline in citizens’ incomes due to aging and other changes.