Korean 'ants' swarm back to Wall Street as KOSPI rout dents homecoming drive

• July retail purchases of U.S. stocks hit $4.6 billion, well above the 2025 monthly average of $2.7 billion and surpassing domestic stock purchases
• Deposits in government-backed Re-shoring Investment Accounts declined for the first time in July, while domestic stock trading account deposits fell to 102.8 trillion won, the lowest since mid-February
• Chipmakers Samsung and SK Hynix accounted for 76% of the KOSPI's market value loss amid concerns over AI spending durability and Chinese competition, while the Nasdaq remained flat over the same period

Summary: Korean 'Ants' Return to U.S. Markets as KOSPI Plunges

South Korean retail investors are flooding back into U.S. equities following a historic collapse in the domestic KOSPI index, undermining government efforts to keep capital at home and pressuring the won currency.

Key Figures:

• Retail purchases of U.S. stocks hit $4.6 billion in July 2025, a six-month high and nearly double the $2.7 billion monthly average for the year
• KOSPI suffered its worst monthly performance since the 2008 financial crisis
• The index lost 2,257.8 trillion won ($1.59 trillion) in market value
• The won jumped 8% in July to a nine-month high, its strongest monthly gain since November 2022

Market Drivers:

Samsung Electronics and SK Hynix accounted for 76% of KOSPI's value destruction amid concerns over AI spending sustainability and Chinese competition. Volatility was amplified by heavily-traded leveraged ETFs. Meanwhile, the Nasdaq remained relatively flat over the same period.

Policy Implications:

Government-backed "Re-shoring Investment Accounts" offering tax incentives experienced their first monthly decline in July. Deposits in domestic stock trading accounts fell to 102.8 trillion won (lowest since mid-February) from a June record of 140 trillion won.

Analysts warn that continued outflows could weaken the won and create challenging portfolio flow dynamics. The stronger currency also reduces incentives to repatriate overseas investments, while expected U.S. interest rate support for the dollar encourages further foreign asset purchases.

Bank of America cautioned that "the path is very narrow" for sustained won appreciation if Korean equities continue underperforming U.S. counterparts, reviving the historical pattern of retail capital flight.