Why A Depreciating Currency Doesn't Always Boost Exports
Takeaway: When a nation's currency depreciates, multinational corporations often expand production at foreign subsidiaries rather than at home, shifting economic gains into overseas profits rather than domestic industrial growth.
Key Points
Rethinking traditional theory: Standard economic models predict that a weaker currency boosts domestic manufacturing by making exports cheaper, but large multinational networks alter this dynamic.
Internal corporate reallocation: During Japan’s 2021–2022 yen depreciation, Japanese parent firms shifted administrative, sales, and managerial support toward expanding overseas affiliates rather than boosting domestic factory output.
Income over trade: Currency depreciation improved Japan's external balance sheet primarily through corporate profits earned abroad rather than through a boom in domestic manufacturing exports.
Why doesn't a falling currency always create factory jobs at home? For decades, introductory economics textbooks taught a straightforward rule: when a nation’s currency loses value, its exports become cheaper in foreign markets, while imports become more expensive at home.
This process—known to economists as "expenditure switching"—is supposed to fuel a domestic manufacturing boom, create industrial jobs, and shrink the trade deficit.
Yet when the Japanese yen depreciated sharply by 25 to 30 percent against major currencies between 2021 and 2022, Japan's trade balance actually deteriorated. Instead of an industrial surge inside Japan, Japanese corporations saw earnings skyrocket at their overseas subsidiaries. The resulting wave of foreign investment income sustained Japan's overall current account surplus, defying conventional textbook predictions.
Research
Economists Ryan Kim, Bin Ni, Hyunseung Oh, and Choongryul Yang set out to explain this paradox by analyzing how exchange rate fluctuations travel through multinational corporate networks.
Using detailed microdata from Japan’s Ministry of Economy, Trade and Industry, the researchers matched Japanese parent companies directly to their foreign affiliates from 2015 to 2022. They tracked how parent firms adjusted corporate investment, local and foreign staffing, and profit remittances in response to exchange rate movements across their international operations.
To test whether these corporate choices shape national economies, the authors embedded their empirical findings into a global macroeconomic framework and evaluated cross-country data spanning 70 nations over a decade.
Findings
The researchers found that a sharp currency depreciation fundamentally changes incentives for multinational firms. Because overseas profits are earned in foreign currencies (such as U.S. dollars or euros), a weaker home currency automatically increases the home-currency value of those foreign earnings.
However, corporate support services—such as executive coordination, purchasing logistics, and commercial sales management—are scarce resources within a parent firm. The study reveals that Japanese parent companies responded to the yen depreciation by reallocating these vital support functions toward their foreign affiliates.
As a result of these policies:
Foreign affiliates expanded: Overseas subsidiaries increased their hiring, capital investment, and local output, generating higher profits that were remitted back to Japanese parent companies.
Domestic operations shifted toward support: At parent headquarters in Japan, employment at non-production commercial offices grew and average wages rose, reflecting higher demand for commercial and coordination staff.
Domestic output remained flat: Because corporate support was directed overseas, domestic manufacturing employment and fixed asset investments declined slightly, leaving aggregate domestic production largely flat.
Limitations and Context
The authors emphasize that this income-led channel depends on host-country market conditions. If demand in foreign markets is weak or depressed by monetary tightening, foreign affiliates cannot easily expand, which limits the growth of direct investment income.
Furthermore, while Japan serves as a prominent case study due to its large outward foreign direct investment (FDI) position, the authors confirmed that this mechanism holds internationally.
Across 70 economies, countries exposed to exchange-rate shocks through large outward FDI networks consistently experienced stronger direct-investment-income growth alongside weaker domestic real GDP growth following currency depreciations.
Why It Matters
For policymakers, central bankers, and corporate leaders, these findings alter how we evaluate currency movements. Traditionally, governments viewed a depreciating currency as a major tool for stimulating domestic industrial production.
However, in modern economies dominated by global corporations, exchange-rate adjustments occur increasingly through the financial income account rather than the domestic physical trade account. A weaker currency can strengthen national financial health through income earned abroad without necessarily producing a boom in domestic factory jobs.
Learn More
Paper Title: Exchange Rate Transmission through Multinational Firms: Evidence from Japan
Authors: Ryan Kim, Bin Ni, Hyunseung Oh, and Choongryul Yang
Journal / Series: Board of Governors of the Federal Reserve System, International Finance Discussion Papers (No. 1446)
Publication Year: 2026
Econ Today Explains
Economic Concept: Direct Investment Income
Direct investment income represents the net earnings that domestic residents and domestic parent companies receive from foreign business operations in which they hold a significant, lasting stake (typically 10 percent or more of voting power).
Recorded under the primary income category of a nation’s current account balance, direct investment income includes distributed earnings (such as dividends), reinvested earnings retained by foreign subsidiaries, and net interest from intercompany debt. Unlike the traditional trade balance, which measures the physical export and import of physical goods and services across national borders, direct investment income measures the financial returns generated by production facilities owned abroad.
This article was written by AI but reviewed by a real human.
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