The Korean Won's Decline Amid Dollar Weakness in 2025: The Hidden Connection Between Stablecoins and Trump's Tariff Policies

In October 2025, global financial markets remain caught in a whirlwind of uncertainty. Despite the Dollar Index (DXY) showing weakness at around 98.94, the Korean won continues to maintain relative weakness with the USD/KRW exchange rate hovering around 1,439 won. This isn't simply a matter of differing economic indicators, but rather a complex picture intertwining the global expansion of stablecoins with the Trump administration's tariff policies.

(Please note that this is my hypothesis, so take it as food for thought.)

In this article, I'll analyze the causes of this phenomenon, explore the potential impact of stablecoins on emerging market currencies, and examine how Trump's "weaker dollar policy" might reshape the future trade order. If you're an investor interested in currency volatility, this analysis might offer some fresh insights.

Dollar Index Weakness and the Won's Decoupling

First, let's look at the current state of the Dollar Index. As of October 24, 2025, the DXY stands at 98.94, down more than 5% from its early-year peak (104-106). This is analyzed as a reflection of the Trump administration's "weaker dollar policy" taking hold in markets. President Trump has expressed this as "not a weak dollar, but a weaker dollar," signaling his intention to boost U.S. export competitiveness through dollar weakness.

(This seems to show that Trump is pursuing dollar depreciation favorable to exports while maintaining dollar hegemony.)

Indeed, this policy stance has been evaluated as changing global capital flows and causing relative dollar weakness against the euro and yen. Considering how the Plaza Accord (1985) led to dollar weakness that improved the U.S. trade deficit, the current administration appears to be employing a similar strategy.

However, despite this dollar weakness, the won remains under pressure. In October 2025, the USD/KRW exchange rate stands at 1,439 won—down 5.91% from the beginning of the year, but still stuck in the mid-1,400s without stabilizing.

More importantly, there's the won's Real Effective Exchange Rate (REER). As of January 2025, the REER is 79.3 (2005=100), indicating that the won is undervalued relative to trading partner currencies. This suggests that despite Korea's strong exports (particularly semiconductors), various structural factors are weighing down the won's value.

Key Factors Behind Won Weakness

Impact of China's Economic Slowdown

Korea's trade dependence on China exceeds 20%. As China's economy struggles to meet growth targets in 2025 due to real estate crises and weak consumption, Korean exports are directly affected. Particularly as the Chinese government maintains a policy of tolerating yuan weakness, the won faces pressure to depreciate as well to maintain competitiveness.

Energy Price Volatility

Korea's energy import dependence reaches 95%. With oil prices hovering between $80-90 per barrel in the first half of 2025, trade balance improvements are constrained. Rising energy import costs reduce current account surplus margins, potentially creating downward pressure on the won's value.

Common Patterns Among Emerging Market Currencies

Interestingly, this "decoupling" phenomenon isn't unique to Korea. Emerging market currencies like the Turkish lira and Argentine peso are experiencing depreciation despite decent economic growth rates.

For example, Turkey recorded 3.2% GDP growth in 2024, yet the lira depreciated over 30%. This is analyzed as resulting from political instability, high inflation (over 60% annually), and sustained capital outflows. Particularly, as Turkish citizens increasingly move assets into dollars or euros—a phenomenon called "dollarization"—lira demand has structurally decreased.

For Korea, while China's economic slowdown and energy price fluctuations are identified as major risks, a more fundamental change may be underway: the transformation of the digital financial ecosystem.

The Rise of Stablecoins: Potential Impact on Won Value

Stablecoins' share in the global financial ecosystem has exploded in 2025. The total market cap has surpassed $300 billion, with Tether's USDT at $176.3 billion (about 58% market share) and Circle's USDC at $75.9 billion holding dominant positions.

These coins are pegged to the USD, functioning as "digital dollars" in countries experiencing inflation or exchange rate instability, potentially eroding demand for local currencies.

Stablecoin Adoption in Korea

Stablecoin usage is also trending upward in Korea's cryptocurrency market. According to industry analysis, a significant portion of Korean exchange trading volume in the first half of 2025 involves USDT/USDC pairs, with reports of increased cryptocurrency channel usage in overseas remittances.

How this change will affect the won's real value remains unclear. However, some worry about this scenario: if users increasingly hold safe assets like Bitcoin or gold and only convert to stablecoins at the moment of payment, the won could be reduced from a "storage currency" to a "conversion currency."

Stablecoin Risks and Opportunities

Stablecoins aren't a perfect solution. Tether has been fined by the U.S. SEC for reserve transparency controversies, and Ethena's USDe recently experienced temporary depegging amid market volatility.

In April 2025, following Trump's tariff policy announcement, USDe reportedly dropped to $0.65 amid market chaos, triggering about $19 billion in liquidations. In contrast, USDT maintained relative stability, analyzed as resulting from Tether's reserves being approximately 70% U.S. Treasury bonds.

Here's where it gets interesting. As the limitations of privately-managed stablecoins become apparent, users may tend to use stablecoins only at the moment of payment rather than for long-term holding. Yet even this could benefit the U.S.—increased stablecoin payments mean increased demand for U.S. Treasuries held in reserves, potentially helping to offset America's fiscal deficit (approximately $1.8 trillion).

The Argentina Case: Stablecoins and the Paradox of Monetary Policy

In October 2025, the U.S. Treasury signed a $20 billion currency swap agreement with Argentina. This support for peso stabilization allows Argentina's central bank to secure dollar liquidity for market intervention.

Paradoxically, the industry reports that USDT adoption surged in Argentina following this swap agreement. Some analysts interpret this as dollar liquidity supply actually accelerating the shift from pesos to "digital dollars." This could be viewed as a case suggesting that stablecoins might weaken the effectiveness of traditional monetary policy.

Of course, this doesn't immediately apply to Korea. Unlike Argentina, Korea has a stable political system and strong economic fundamentals. However, the long-term impact of digital financial ecosystem changes on monetary sovereignty deserves attention.

Trump's Tariff Policy: Potential Links Between Stablecoins and Trade Wars

The Trump administration's tariff policy is a major topic in the 2025 global economy. Following the so-called "Liberation Day" announcement imposing over 50% tariffs on China and proclaiming reciprocal tariff principles, markets experienced significant turmoil before settling down with a 90-day suspension.

Recent reports indicate that Trump is pressuring China by mentioning an additional 100% tariff, while simultaneously showing flexibility by considering Japanese election results and EU negotiations.

The GENIUS Act and Stablecoins' Strategic Position

The GENIUS Act (Guiding and Establishing National Innovation for US Stablecoins Act) passed in July 2025 presents a new framework for stablecoin regulation. This legislation designates stablecoins as core elements of the U.S. financial ecosystem, mandating USD backing and clarifying issuer responsibilities.

Interestingly, the Trump administration is signaling the possibility of using stablecoins as a "quiet counterattack" against BRICS nations' de-dollarization movements.

And here's a hypothesis I've been thinking about: What if tariff exemptions or reductions were conditioned on "holding USDT above a certain amount" or "using stablecoin payments in trade transactions"?

This could bind emerging market companies even more deeply to the dollar ecosystem.

Of course, this remains a hypothetical scenario, and whether such policies will actually be implemented is uncertain. However, considering that the Trump administration doesn't hesitate to use unconventional economic policy tools, this possibility can't be entirely ruled out.

Market Reactions and Volatility

On X (formerly Twitter) and other social media, discussions about connections between Trump's tariff announcements and stablecoin market volatility are active. The USDe depegging incident occurred shortly after Trump's tariff tweets, reportedly triggering about $19 billion in liquidations.

Meanwhile, USDT maintained relative stability, which some interpret as the market's learning process regarding the stablecoin structure preferred by the Trump administration. In other words, a perception may have formed that stablecoins with U.S. Treasury-backed reserves are more resilient to policy risks.

Future Outlook: End of 2025 and Beyond

If the Dollar Index drops further to 95-97 by the end of 2025, there's room for the won to settle below 1,400. However, several variables exist—let me explain using the won as a reference point for clarity.

Optimistic Scenario (1,380-1,400 won)

Accelerated Fed rate cuts deepening dollar weakness
Real effects from China's economic stimulus
Sustained semiconductor supercycle boosting Korean exports
Substantial easing of Trump's tariff policies

Pessimistic Scenario (1,450-1,480 won)

Full implementation of Trump tariff policies contracting global trade
Further China slowdown and yuan depreciation
Structural decrease in won demand due to stablecoin expansion
Oil price surge from Middle East geopolitical risks

The most likely outcome is somewhere in the middle—fluctuations in the 1,420-1,440 range with volatility.

Preparing for Long-term Structural Changes

More important than short-term exchange rate fluctuations are long-term structural changes. A "new world order" intertwining digital finance and geopolitical tensions may be forming. In this environment:

Redefining Monetary Sovereignty: How central banks' roles and authority will change in the stablecoin era
Digital Asset Roles: How Bitcoin, gold, and other traditional safe assets will coexist with digital assets
Evolution of Trade Settlement Systems: To what extent blockchain-based payments will replace SWIFT

Answers to these questions will gradually emerge over the next 5-10 years.

Practical Strategies for Investors

In times of high currency volatility and rapid digital financial ecosystem changes, consider these strategies:

Asset Allocation Strategy

Foreign Currency Diversification: Diversify into euros, yen, etc. even during dollar weakness
Increased Safe Assets: Maintain 20-30% in traditional safe assets like gold and U.S. Treasuries
Small Digital Asset Allocation: Consider Bitcoin at under 5% of total portfolio

Risk Management

Currency Hedging Products: Consider forward contracts for import/export businesses
Volatility Preparation: Diversify stablecoin holdings (USDT, USDC, etc.)
Liquidity Maintenance: Hold cash assets to respond to sudden market movements

However, individual investors should establish asset allocation strategies from a long-term perspective rather than short-term speculation for currency gains. Particularly when investing in new asset classes like stablecoins, thoroughly understand regulatory risks and depegging dangers.

What we're witnessing in October 2025 may signify more than simple currency fluctuations. I believe there are no meaningless actions in international relations. The won's relative weakness despite dollar weakness is a problem requiring consideration not only of traditional economic factors but also the rise of digital finance, geopolitical tensions, and the formation of a new trade order.

How much stablecoins will erode emerging market currencies, whether Trump's tariff policies will actually link with stablecoins, and how Korea will respond to these changes remain uncertain. However, being prepared for these possibilities versus not being prepared can make a huge difference.

One thing is certain: what we're experiencing may be the beginning of a "new normal." A new era where traditional currency systems and digital finance coexist and compete is opening, and within it, national monetary policies, corporate strategies, and individual asset management approaches must evolve.

What do you think about these changes? Do you believe stablecoins will genuinely threaten emerging market currencies? Or is this excessive concern? Please share your thoughts in the comments!

Sources and References

This article was written based on various reliable sources. Links are organized below:

Dollar Index (DXY) Data: TradingView - DXY Chart and Yahoo Finance - US Dollar Index
USD/KRW Exchange Rate and REER: Trading Economics - South Korean Won and BIS - Effective Exchange Rates
Stablecoin Market Data: CoinDesk - Tether and Circle's Dominance and The Block - Stablecoin Market Cap
Argentina Currency Swap: Reuters - Argentina's $20B Currency Swap and The Guardian - Argentina US Swap Deal
Trump Tariff Policies and Stablecoins: Law & Liberty - The Great Stablecoin Heist of 2025 and Cleveland Fed - Tariffs and Stablecoins Working Paper

This article was written based on publicly available information as of October 26, 2025, and includes analysis and projections. It is for informational purposes, not investment advice.

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