Foreign currency movements change the domestic-currency value of obligations and so directly affect how liabilities are valued on balance sheets. When an entity owes amounts denominated in a foreign currency, a depreciation of the domestic currency increases the local-currency cost of settling those obligations. This is a core channel of exchange rate risk in corporate and sovereign finance and is widely discussed by Kenneth Rogoff at Harvard University and Raghuram Rajan at University of Chicago Booth School of Business.
Mechanism
The primary drivers are the currency denomination of debt and the accounting basis used for valuation. Foreign-currency-denominated liabilities are remeasured into the reporting currency at prevailing exchange rates, producing mark-to-market gains or losses. Hedging strategies and natural offsets in revenues quoted in the same foreign currency can mitigate this effect, but such protections are uneven across sectors and countries. Hyun Song Shin at the Bank for International Settlements highlights how currency-induced balance sheet effects can propagate through the financial system when many agents share similar exposures.
Implications and contextual nuances
Consequences vary by borrower type and territory. Corporations that have borrowed abroad but earn mainly in local currency face immediate profit compression and potential covenant breaches after depreciation. Sovereign borrowers with external debt encounter higher debt-service burdens that can constrain public spending on social and environmental programs, amplifying hardship in vulnerable regions. Carmen Reinhart at Harvard University emphasizes historically how currency mismatches have preceded financial distress in emerging markets. The human cost includes layoffs, reduced investment, and curtailed public services, with cultural and territorial impacts differing between export-dependent economies and those relying on remittances.
Policy and market responses matter. Floating exchange rates, deep local-currency debt markets, robust hedging markets, and prudent disclosure reduce vulnerability. But in many low-income countries and small firms, limited access to hedging and thin domestic bond markets leave liabilities sensitive to exchange shocks. For creditors, transparent reporting of currency composition and for regulators, stress testing that incorporates plausible exchange rate paths improves resilience. Academic and policymaker analyses by Rogoff, Rajan, and the Bank for International Settlements collectively point to the central role of currency composition and market structure in determining how foreign currency movements translate into real economic outcomes.