Global Markets in Turmoil: South Korea Triggers Circuit Breakers as Risk Assets Plunge

A wave of selling swept across global markets on Tuesday, June 23, 2026, as a technology-led rout on Wall Street cascaded into Asia and beyond. South Korea's Kospi index triggered circuit breakers after plunging over 8%, while Japan's Nikkei 225 gave back its recent all-time highs. The turmoil extended to cryptocurrency markets, with Bitcoin falling below $63,000 and over $580 million in long positions liquidated in 24 hours.

South Korea's Circuit Breakers Activated

The Kospi's 8% decline triggered automatic trading halts for 20 minutes, a rare event that underscores the severity of the sell-off. The move came after a sharp drop in U.S. tech stocks, with Nasdaq futures falling around 2.5% amid a global chip-stock selloff. The rout was fueled by growing fears of a hawkish Federal Reserve, with Fed funds futures pricing in an 85% chance of a quarter-point rate hike by September.

Japan's Nikkei Reverses Record Highs

Just a day after printing a fresh all-time high, Japan's Nikkei 225 reversed sharply, dragging down risk appetite across Asia. The yen weakened to a 40-year low near 161.56 against the dollar, as the greenback extended broad gains. The dollar index rose to its highest level in over a year, supported by hawkish Fed bets and ongoing geopolitical uncertainty.

Cryptocurrency Bloodbath

The sell-off hit cryptocurrencies particularly hard. Bitcoin broke below $63,000, while Ethereum suffered an even more brutal decline. On-chain data revealed a massive leverage flush, with long positions liquidated in waves. Retail traders in Korea, Japan, and Southeast Asia began selling into exchanges, with Binance recording the largest inflows, most of which quickly turned into sell orders. Spot Bitcoin ETF outflows continued, removing a key layer of buying support.

Dollar Strength and Currency Turmoil

The U.S. dollar firmed as traders positioned for a more hawkish Fed. The euro fell to its lowest level since August 2025, while the British pound declined 0.5% amid political uncertainty following the resignation of Prime Minister Keir Starmer. The yen's slide to near 40-year lows added to the risk-off sentiment, as the Bank of Japan faces pressure to intervene.

Geopolitical Factors

Geopolitical tensions added to the uncertainty. U.S. Vice President Vance claimed progress on getting nuclear inspectors back into Iran, but Iranian officials quickly shut down the report. Meanwhile, the U.S. Treasury issued a 60-day license authorizing the production, delivery, and sale of oil from Iran, a move that could impact global oil markets.

Key Takeaways

1. South Korea's Kospi triggered circuit breakers with an 8% drop, reflecting severe market stress.
2. Japan's Nikkei reversed its all-time high, dragging Asian risk appetite lower.
3. Nasdaq futures fell 2.5% amid a global chip-stock selloff.
4. Bitcoin broke below $63,000, with $580 million in long liquidations.
5. The dollar surged to a one-year high, while the yen neared 40-year lows.
6. Geopolitical tensions and hawkish Fed bets fueled the risk-off move.

Sources: CNBC, CryptoNews, CNBC Dollar