South Korean retail investors poured $4.6 billion into US stocks in July, their largest monthly haul since January 2026, after leveraged bets at home reversed hard and left tens of billions of dollars in losses. The KOSPI just posted its worst monthly decline since the 2008 financial crisis, and the pivot abroad has pushed Korean holdings of US equities to nearly $200 billion.
South Korean retail investors, known as "ants" for their collective buying power, poured $4.6 billion into US equities in July, their largest monthly haul since January 2026. That's nearly double their average monthly purchases of $2.7 billion throughout 2025.
The timing tracks a domestic rout. Back home, the KOSPI just posted its worst monthly decline since the 2008 global financial crisis, dropping roughly 40% from its June peak.
A leveraged bet turns into a wipeout
South Korea introduced single-stock leveraged ETFs on May 27, and retail traders dove in fast. The products let investors use leverage to amplify bets on individual stocks. Traders funneled roughly 14 trillion won — the equivalent of $9.4 billion to $9.7 billion depending on exchange rates at the time — into the products, and when the underlying stocks, particularly AI-related names such as Samsung Electronics and SK Hynix, reversed hard, the leverage cut the other way.
The damage was steep. Estimated retail losses from the leveraged positions totaled somewhere between $38.7 billion and $39 billion.
More than 1.2 million accounts were hit with margin calls, affecting over 3.4% of South Korea's adult population. Foreign institutional investors weren't sticking around either, dumping a record $30.72 billion worth of Korean stocks and bonds in the month before the retail exodus.
"Seohak ants" push US holdings toward $200 billion
Korean retail investors who buy overseas stocks earn a separate nickname: "seohak ants," meaning ants who study abroad. By June 2026, Korean retail holdings in US equities had reached nearly $200 billion, making South Korean individual investors one of the largest foreign ownership blocs in American stocks. July's surge marked the first time since February 2026 that net inflows into US equities outpaced new domestic investment from Korean retail traders.
A weakening won feeds the outflow
Every dollar an "ant" puts into Tesla or Nvidia first gets converted from won, adding selling pressure on the currency. Korea Securities Depository flagged the growing volatility of retail-driven capital flows as a systemic concern. A weaker won amplifies the local-currency returns on US holdings, which encourages still more money to head overseas.
Source: Crypto Briefing
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