Japanese and South Korean stock markets reached all-time record highs on Friday, May 29, 2026 [2], as investors reacted to geopolitical optimism.
The surge reflects a growing confidence among global investors that the conflict between the U.S. and Iran is winding down. Because these markets are highly sensitive to global energy stability and trade security, the prospect of prolonged peace directly impacts investor appetite for risk.
Japan's Topix and South Korea's Kospi both hit record peaks during Friday's trading session [1], [2], [3]. This rally was driven primarily by expectations that the U.S. and Iran would extend their current cease-fire by 60 days [1]. The potential for a two-month extension provides a critical window for diplomatic efforts to stabilize the region, a move that typically lowers the cost of insurance for shipping and reduces volatility in energy markets.
Market sentiment in Tokyo was further bolstered by domestic economic data. Investors cheered reports of slower-than-expected inflation within Japan [1], [3]. This combination of cooling domestic prices and a decrease in international tension created a favorable environment for equity growth.
In Seoul, the Kospi followed a similar trajectory as the ceasefire news broke [2], [3]. The South Korean market, which relies heavily on exports and global industrial stability, responded positively to the likelihood of a de-escalated war. The move toward a 60-day extension [1] suggests a commitment from both the U.S. and Iran to avoid a return to active hostilities in the immediate future.
Analysts said that the simultaneous climb of both the Topix and Kospi underscores the interconnected nature of East Asian markets regarding Middle Eastern stability. The rally occurred as traders moved away from safe-haven assets and back into growth-oriented equities [2].
“Japan's Topix and South Korea's Kospi both hit record peaks during Friday's trading session.”
The record-breaking performance of the Topix and Kospi demonstrates how heavily Asian financial hubs are tethered to U.S. foreign policy in the Middle East. By pricing in a 60-day ceasefire extension, markets are betting that the risk of a sudden energy price shock has diminished, allowing them to prioritize economic growth and inflation data over geopolitical fear.
