Geopolitical Tensions Escalate, KOSPI Circuit Breaker, US Yields Hit Four-Week High

1. Tensions between the US and Iran escalated, pushing US crude futures up over 3% amid concerns of a fragile truce.
2. South Korea's KOSPI index plunged up to 5% intraday, triggering a circuit breaker and pausing algorithmic trading.
3. The 10-year US Treasury bond yield rose to a four-week high of 4.565%, reflecting market concerns.