A board above the trading floor of the New York Stock Exchange displays the closing number for the Dow Jones industrial average, Wednesday, June 17, 2026. (AP Photo/Richard Drew)

A currency dealer stands in front of a screen showing South Korea's benchmark stock index (KOSPI) as it breaks 9,000 points in a foreign exchange dealing room at the Hana Bank headquarters in Seoul on June 18, 2026. South Korea's benchmark Kospi index topped 9,000 points for the first time on June 18, on the back of a tech-fuelled rally led by chip titans Samsung and SK hynix. (Photo by Jung Yeon-je / AFP via Getty Images)

Currency dealers stand in front of a screen showing South Korea's benchmark stock index (KOSPI) as it breaks 9,000 points in a foreign exchange dealing room at the Hana Bank headquarters in Seoul on June 18, 2026. South Korea's benchmark Kospi index topped 9,000 points for the first time on June 18, on the back of a tech-fuelled rally led by chip titans Samsung and SK hynix. (Photo by Jung Yeon-je / AFP via Getty Images)

Currency dealers stand in front of a screen showing South Korea's benchmark stock index (KOSPI) as it breaks 9,000 points in a foreign exchange dealing room at the Hana Bank headquarters in Seoul on June 18, 2026. South Korea's benchmark Kospi index topped 9,000 points for the first time on June 18, on the back of a tech-fuelled rally led by chip titans Samsung and SK hynix. (Photo by Jung Yeon-je / AFP via Getty Images)

Currency dealers stand in front of a screen showing South Korea's benchmark stock index (KOSPI) as it breaks 9,000 points in a foreign exchange dealing room at the Hana Bank headquarters in Seoul on June 18, 2026. South Korea's benchmark Kospi index topped 9,000 points for the first time on June 18, on the back of a tech-fuelled rally led by chip titans Samsung and SK hynix. (Photo by Jung Yeon-je / AFP via Getty Images)

Currency dealers monitor exchange rates as a screen shows South Korea's benchmark stock index (KOSPI) as it breaks 9,000 points in a foreign exchange dealing room at the Hana Bank headquarters in Seoul on June 18, 2026. South Korea's benchmark Kospi index topped 9,000 points for the first time on June 18, on the back of a tech-fuelled rally led by chip titans Samsung and SK hynix. (Photo by Jung Yeon-je / AFP via Getty Images)

Pedestrians walk past an electronic quotation board displaying the Nikkei Stock Average on the Tokyo Stock Exchange in Tokyo on June 18, 2026. (Photo by Kazuhiro NOGI / AFP via Getty Images)

Pedestrians walk past an electronic quotation board displaying the Nikkei Stock Average on the Tokyo Stock Exchange in Tokyo on June 18, 2026. (Photo by Kazuhiro NOGI / AFP via Getty Images)