NEW YORK (AP) — Some calm is returning to Wall Street, and U.S. stocks are rising on Monday, while oil prices are giving back some of their initial spurts following Israel’s attack on Iranian nuclear and military targets at the end of last week.

Oil futures jumped as the market reopened Sunday night, building on last week’s surge after Israel attacked Iranian energy facilities over the weekend and underlining fears around potential disruption to Middle Eastern crude flows.

Ukrainian President Volodymyr Zelenskyy says rising global oil prices following Israeli strikes on Iran will strengthen Russia by increasing its oil revenues, aiding its war effort in Ukraine.

Iran and Israel continued trading fire in a fourth day of armed escalations. "The residents of Tehran will pay the price, and soon," Israeli Defense Minister Israel Katz pledged following reported Iranian strikes against Tel Aviv and Haifa.

Stock futures rebounded slightly early Monday as the spike in oil prices due to the escalating conflict between Israel and Iran eased for a moment. Stock gains were muted as investors remained concerned about the rising geopolitical risk to the global economy.

A sustained rise in the price of crude oil, which jumped sharply after Israel attacked Iran, could hurt consumers and President Trump’s efforts to bring down energy costs.

Oil prices leaped, and stocks slumped on worries that escalating violence following Israel’s attack on Iranian nuclear and military targets could damage the flow of crude around the world, along with the global economy.

Diamondback Energy stock rose 5% and Occidental Petroleum rose nearly 5% as a swathe of energy-related stocks reacted to a jump in crude prices after Israel's attack on Iran. Conoco-Phillips' stock rose 4%, ExxonMobil rose 3% and Chevron gained 2.7%.