South Korea's KOSPI index surged to the 8,500 level following a cease-fire agreement between the U.S. and Iran [1].

The market rally signals a significant shift in investor sentiment as the region moves away from the economic instability caused by the conflict. This volatility had pressured Asian markets and currency valuations for several months.

The KOSPI rose more than five percent to settle at 8,545 points [1]. During the trading session, the index briefly broke above 8,600 points [1]. The surge was led by major technology stocks; Samsung Electronics and SK Hynix rose by more than four percent and six percent, respectively, according to reporter Park Ki-wan of YTN [3].

Foreign investors drove the rally by net-buying over 1 trillion won of Korean equities [1]. In contrast, domestic investors net-sold 1.4 trillion won [1]. This divergence highlights a return of international capital to the Seoul market as geopolitical risks diminish.

The foreign exchange market also reacted to the news. The won-dollar exchange rate fell to 1,511.1 KRW per USD [1]. The strengthening of the won reflects increased confidence in the domestic economy following the cessation of hostilities.

"Domestic stock markets surged on the news of the end-of-war agreement between the US and Iran," an YTN anchor said [1]. Reporter Park Ki-wan said that the KOSPI soared immediately upon opening because the war in Iran, which had held back the global economy for more than three months, had ended [2].

“The KOSPI rose more than five percent to settle at 8,545 points.”

The sharp rally in the KOSPI and the strengthening of the won demonstrate how heavily South Korea's export-driven economy is tied to global geopolitical stability. The massive influx of foreign capital suggests that international investors viewed the U.S.-Iran conflict as a primary deterrent to entering Korean markets. A sustained cease-fire may lead to a period of reduced currency volatility and renewed growth for semiconductor giants like Samsung and SK Hynix.