Stock markets across Asia-Pacific and Europe experienced significant declines, with European stock index futures extending losses. The STOXX 50 index futures fell 1.1%, while the German DAX index futures dropped 1.2%. In Asia, the Korean exchange triggered a circuit breaker for the KOSPI index after the KOSPI 200 futures plummeted by 5%, halting algorithmic trading for five minutes. Meanwhile, Japan's Nikkei 225 index continued its downward trend, declining by 4%.