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Lecture 9: The Balance of Payments

The Balance of Payments (BoP) is the statistical record of all economic transactions between a country's residents and the rest of the world.

Entry Type Sign Economic Meaning
Credit + Receipts from foreigners (Money flows IN)
Debit - Payments to foreigners (Money flows OUT)

1. Current Account (CA)

Focuses on the "real" economy—trade in goods, services, and income flows.

2. Capital Account (KA)

A small category. In modern accounting (BPM6), this is distinct from the Financial Account. It covers non-market transfers and non-produced, non-financial assets.

3. Financial Account (FA)

Focuses on asset ownership. This measures how the Current Account is financed.

Records transactions involving financial assets and liabilities. This is the "Net Lending/Borrowing" side of the ledger.

Key Sub-components:

4. Statistical Discrepancy (SD)

Because the BoP is based on double-entry bookkeeping, the total must equal zero. The SD accounts for data gaps, timing differences, and illegal or unreported trade.

SD = – (Current Account + Capital Account + Financial Account)

CA + KA + FA + SD = 0

If we ignore the small capital account and statistical discrepancy:

FA = – CA

Current account deficit → FA surplus → net borrowing

Current account surplus → FA deficit → net lending

If a country runs a CA Deficit, it must be balanced by a Financial Account Surplus (Net Borrowing). In other words, the country must sell assets or borrow from abroad to pay for its net imports.

Question: Assume that the statistical discrepancy and KA are both zero. If a country's current account is in deficit, and private foreign investors do not buy any of the country's assets, is the central bank selling, or buying, foreign-exchange reserves?

Data

View BP data for the United States: RPubs: U.S. International Transactions

Check Your Understanding

Test your knowledge of the BPM6 identities. Assume the Capital Account (KA) is zero unless stated otherwise.

Problem 1: The Basic Identity

A country reports a Current Account (CA) surplus of $50 billion. Its Financial Account (FA) shows a net outflow of $48 billion.

  1. Calculate the Statistical Discrepancy (SD) required to balance the accounts.
  2. Is this country a net lender or a net borrower?
View Solution

a) SD = -$2 billion (Since 50 - 48 + SD = 0).
b) Net Lender (A CA surplus implies the country is acquiring foreign assets).

Problem 2: Net Borrowing

An emerging market is a net borrower of $120 billion. Its Statistical Discrepancy (SD) is -$5 billion.

  1. What is the value of the Financial Account (FA)?
  2. Solve for the Current Account (CA) balance.
View Solution

a) FA = +$120 billion (Net borrowing is a surplus/inflow).
b) CA = -$115 billion (CA + 120 - 5 = 0).

Problem 3: Official Reserves

A nation’s imports exceed exports by $200 billion (CA = -$200B). The central bank increased its foreign reserve assets by $10 billion, while private investors moved $185 billion into the country.

  1. Calculate the total Financial Account (FA) balance.
  2. Calculate the Statistical Discrepancy (SD).
View Solution

a) FA = +$175 billion (-$10B reserve increase + $185B private inflow).
b) SD = +$25 billion (-200 + 175 + SD = 0).

Note: Every international transaction enters the BoP twice—once as a credit and once as a debit. If these don't sum to zero in the raw data, the SD is used to reconcile them.