From the national income accounting identity, it follows that should national savings fall short of investment the country will have a trade surplus.

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The national income accounting identity, also known as the GDP identity, is Y = C + I + G + NX, where Y represents national income or GDP, C represents consumption, I represents investment, G represents government spending, and NX represents net exports (exports minus imports). It does not indicate a direct relationship between savings and trade surplus. While lower national savings could potentially lead to a trade surplus (as domestic investment is being financed by foreign savings), this is not always the case and depends on other factors such as domestic and foreign demand for exports and imports.

From the National Income Accounting Identity, It Follows That Should