The J-curve effect describes the short-run tendency for a country's balance of trade to deteriorate even while its currency is depreciating.
The "J-curve" effect describes the short-run tendency for a country's balance of trade to deteriorate even while its currency is depreciating. This means that despite a depreciation in currency value, the country's trade deficit worsens. The J-curve effect is commonly observed in international trade when a country experiences a lag in the improvement of its current account balance following currency depreciation.