Crude oil prices rose sharply on Monday following a US-Israel strike on Iran that disrupted supply and limited investor access to oil. Brent crude jumped about 13 percent in a single day, while the international benchmark increased nearly 5 percent. By midday in Tokyo, the price per barrel reached 76.48 dollars, according to Al Jazeera.

Asian stock markets opened lower as investors reacted to the oil price surge. The Hang Seng Index in Hong Kong fell around 1 percent, and Japan’s Nikkei 225 dropped about 1.5 percent. In the United States, stock futures traded outside regular hours also showed significant losses, with both the S&P 500 and the tech-heavy Nasdaq Composite down roughly 0.7 percent.

The developments suggested a volatile trading day ahead for global markets as energy costs spiked and geopolitical tensions heightened following the attack on Iran.