Oil, Nikkei 225, Hang Seng Index, Kospi

Asia-Pacific markets jumped Tuesday, with South Korean equities leading regional gains after a sharp drop in oil prices eased investor concerns following signs of de-escalation in the Middle East conflict.

South Korea’s Kospi surged 3.5%, while the small-cap Kosdaq was 3.29% higher. Japan’s Nikkei 225 rose 2.2%, while the Topix added 2.47%. Australia’s S&P/ASX 200 rose by over 0.74%.

Hong Kong Hang Seng index futures were at 25,020, compared with the index’s last close of 24,382.47.

The gains came after U.S. President Donald Trump said Monday he had instructed the U.S. military to delay planned strikes on Iran’s power plants and energy facilities for five days, after discussions with Iranian officials.

However, Iranian state media, citing an unnamed senior security official in a Telegram post, disputed Trump’s account, denying that any talks had taken place between Washington and Tehran.

Oil prices tumbled on Monday following Trump’s comments.

“I AM PLEASE TO REPORT THAT THE UNITED STATES OF AMERICA, AND THE COUNTRY OF IRAN, HAVE HAD, OVER THE LAST TWO DAYS, VERY GOOD AND PRODUCTIVE CONVERSATIONS REGARDING A COMPLETE AND TOTAL RESOLUTION OF OUR HOSTILITIES IN THE MIDDLE EAST,” Trump said Monday in a Truth Social post.

In early trading on Tuesday, crude prices were largely stable. The U.S. West Texas Intermediate was about 1.5% higher at $89.5 per barrel.

Overnight in the U.S., stocks rallied Monday. The Dow Jones Industrial Average jumped 631 points, or 1.38%, to close at 46,208.47. The S&P 500 rose 1.15% and ended at 6,581.00, while the Nasdaq Composite gained 1.38% and settled at 21,946.76.

Before Trump’s comments, posted on Truth Social early Monday, futures pointed to more losses for equity markets under siege from skyrocketing oil prices and uncertainty about the duration of the Iran conflict. But after Trump’s comments, Dow futures briefly surged more than 1,000 points.

—CNBC’s Sean Conlon and John Melloy contributed to this report.