The 1,500 Won Truth: Why the “Seohak Ants” Were Wrongfully Accused 🐜

The Search for a Financial Scapegoat

For the past two years, a persistent mystery has haunted the Korean economy: the relentless depreciation of the won. As the USD/KRW exchange rate climbed to uncomfortable heights, authorities and the media sought a convenient culprit. They found one in the “Seohak Ants”—the massive wave of Korean retail investors aggressively pivoting toward overseas markets.

High-ranking officials, including the Governor of the Bank of Korea, specifically identified these retail outflows as a primary driver of currency instability. The narrative was simple: by selling won to purchase dollars for U.S. tech stocks, these investors were fueling capital flight and sabotaging the domestic currency. However, recent data surrounding a landmark policy shift suggests that these investors were merely serving as a “convenient shield” for deeper, structural issues. We were looking at the wrong culprit all along.

Takeaway #1: The Scale of the “Ant” Invasion 🐜

The anxiety felt by financial authorities wasn’t entirely unfounded when looking at the raw numbers. In 2024, the net purchase of overseas stocks by retail investors sat at approximately $10.1 billion (14.8 trillion won).

However, by November 25, 2025, that figure had surged to $28.8 billion, with projections suggesting it would clear the $30 billion mark by year-end. This represents a staggering 200% increase in purchase volume in just one year. From a macro perspective, the $20 billion year-over-year expansion in dollar demand provided a perfect statistical correlation for those looking to blame retail behavior for the won’s weakness.

Takeaway #2: The RIA Account — A Carrot for Capital Return 🥕

To test the hypothesis that retail demand was the primary cause of the currency’s decline, the government introduced the Return to Investment Account (RIA) on March 23, 2026. This was a strategic “carrot” designed to lure capital back to the domestic market through aggressive tax incentives for investors who liquidated overseas holdings and returned to won-denominated assets.

The tax deduction schedule was front-loaded to create immediate selling pressure on the dollar:

• May 2026: 100% capital gains tax deduction upon conversion to won.
• June – July 2026: 80% deduction.
• August – December 2026: 50% deduction.

This policy created a fascinating natural experiment in monetary divergence. While authorities were trying to fix the won, the global environment was shifting in a way that should have helped them naturally.

One-line comment: The exchange rate rise is caused by either the dollar strengthening or the won weakening. While the Dollar Index stood at 109.81 earlier, it has since dropped to 99.58—and eventually reached a low of 98.91. The dollar isn’t getting stronger; it’s getting weaker. The real issue is that the won is weakening significantly faster than a global dollar that is itself in decline.

Takeaway #3: The Great Portfolio Rotation (NVIDIA to Samsung) 🔄

The RIA incentives triggered a massive, rapid rotation in investor portfolios. As the 100% tax exemption deadline approached in late May, retail investors began offloading their high-flying U.S. growth positions to bring capital home.

Within only one month of the RIA launch, the scale of the rotation was immense:

• Adoption: 160,000 accounts opened with a total balance exceeding 1 trillion won.
• The Global Exit: Investors heavily sold off:
  • NVIDIA 📉
  • Tesla 📉
• The Domestic Buy-In: Capital was reallocated into KOSPI heavyweights:
  • Samsung Electronics 📈
  • SK Hynix 📈

Takeaway #4: The “Smoking Gun” — Why the Ants are Innocent 🕵️‍♂️

The RIA experiment provided the “smoking gun” that proves the Seohak Ants were wrongfully accused. If retail buying was the engine driving the exchange rate higher, the massive pivot to dollar selling in April and May should have caused the won to appreciate significantly.

The data, however, reveals a stark structural decoupling:

• Jan – March 2026: Retail investors were net buyers (+4.8B in Jan, +3.9B in Feb).
• April 2026: The trend reversed to a net sell-off of $515 million.
• May 2026: Net selling accelerated to over $1.13 billion by the 25th of the month.

Despite billions of dollars flowing back into the Korean market and the global Dollar Index sinking to 98.91, the won-dollar exchange rate remained stubbornly stuck above the 1,500 won mark. This is the definitive proof that the currency crisis was never about retail investors. Even when they stopped buying and started selling en masse, the won failed to recover. The “Seohak Ants” have been officially exonerated; the won’s weakness is fundamentally a structural economic failure, not a retail-driven trend.

Conclusion: A Provocative Look Ahead

The RIA experiment has effectively cleared the “Seohak Ants” of their status as currency villains. While their overseas activity was a convenient target for political rhetoric, the data shows that the won is underperforming even against a globally weakening dollar.

As the window for the 100% tax incentive closes, we are left with a haunting question: If a billion-dollar retail sell-off can’t move the needle on the 1,500 won rate, what is the real source of the won’s terminal weakness? This policy shift has revealed a deeper economic truth that should worry every domestic investor. 🌏