The balance of payments statistics consists of three main accounts which must sum to zero due to double-entry bookkeeping practices.
Note that the IMF uses a different system with three accounts. This question refers to the more common system used by corporations and most governments.
The first of these accounts measures the flow of funds for purpose of trade in goods and services. This is known as the
The second measures the flow of funds for purpose of trade in financial assets. This is known as the