Current Account Deficit with a Commodity Price Fall
A commodity-exporting economy runs a current account deficit of 4 per cent of GDP. Its main export price has fallen 25 per cent. Export volumes are unchanged. The currency has depreciated 10 per cent. The economy has a large net foreign liabilities position at 60 per cent of GDP, and a substantial share of external debt is denominated in foreign currency. Domestic investment exceeds domestic saving by 4 per cent of GDP. The central bank holds the cash rate at 3.5 per cent and inflation is 3.2 per cent.
1. Explain the likely path of the current account and the valuation effect on net foreign liabilities.
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Trade balance: export prices fall 25 per cent with volumes unchanged, so export value falls about 25 per cent. That worsens the trade balance and, all else equal, widens the current account deficit beyond 4 per cent of GDP. The 10 per cent depreciation helps: it raises import prices in domestic currency, encouraging import substitution and improving competitiveness for non-commodity exports, but with export volumes fixed in the short run the price fall dominates.
Valuation effect: net foreign liabilities at 60 per cent of GDP are partly foreign-currency denominated. A 10 per cent depreciation raises the domestic-currency value of that foreign debt, so net foreign liabilities rise as a share of GDP even without new borrowing. This is a valuation loss, not a transaction flow, but it worsens the external position.
Judgement: the current account likely widens in the near term, and the valuation effect makes the headline external position look worse than the underlying flow. The depreciation is a partial stabiliser, not a fix, because the export price shock is larger than the currency move.
2. Assess whether the 4 per cent investment–saving gap is a problem, and what the central bank should do.
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The gap: domestic investment exceeding domestic saving by 4 per cent of GDP means the current account deficit is the external counterpart of that gap. The deficit is therefore financing investment, which can be growth-enhancing, not necessarily consumption. Whether it is a problem depends on the return on that investment relative to the cost of foreign funds.
Risk: with net foreign liabilities at 60 per cent of GDP and foreign-currency debt, a persistent deficit plus valuation losses raises the risk premium and the cost of servicing debt. If the investment is low-return, the deficit is a genuine vulnerability; if high-return, it is sustainable.
Central bank decision: inflation at 3.2 per cent is above a typical 2–3 per cent band, but the economy faces a negative external shock. Raising rates would support the currency and reduce imported inflation, but would discourage the investment that justifies the deficit. Holding at 3.5 per cent is defensible: the depreciation is already tightening conditions, and a hike would compound the shock. A strong answer notes the bank should hold with a tightening bias and watch whether the depreciation passes through to inflation.