The " economic onslaught " that Treasury Secretary Scott Bessent has declared on Iran's financial connections around the world may have one major caveat: China.

Beijing is Iran's biggest trading partner and its leading oil buyer. While the U.S. is trying to isolate the Islamic Republic from its remaining economic partners, President Donald Trump also is preparing to host Chinese leader Xi Jinping next month to maintain a fragile trade truce.

The top diplomats of Iran and Oman met on Tuesday to discuss a phased approach to managing ship traffic through the Strait of Hormuz, which remains largely shut down nearly six months after the Iran war began.

The talks came after an oil tanker was disabled in an attack off the coast of Oman, underscoring the ongoing dangers for shipping companies attempting to use the waterway while it's under Iranian control.

China said on Tuesday it would safeguard its interests after Washington laid out plans for the "economic asphyxiation" of Beijing's economic partner Iran.

Almost six months into its war with Iran, the United States issued new penalties on some entities including in China and expanded secondary sanctions threats, urging governments worldwide to join its economic campaign.

US futures are lower as bond market pressure will have investors eyeing an annual meeting of top U.S. economic officials at Jackson Hole, Wyoming later in the week.

The future for the S&P 500 was down 0.2%. On Friday, the S&P 500 rose 0.4% for just its second gain in the six days since setting its all-time high last week. Dow Jones Industrial Average futures fell 0.1%, while Nasdaq futures slipped 0.7%.

Mark Carney drew international attention as Canada's prime minister by warning that middle powers must resist economic coercion by more powerful countries. Now President Donald Trump is putting that warning to the test with sweeping new tariffs that could show how much economic pain Canada can absorb.

Tensions escalated late Friday when Canada walked away from negotiations after Carney concluded the United States was demanding too much in exchange for tariff relief. The U.S. imposed 50% duties Saturday on about $20 billion worth of Canadian goods, and Carney announced dollar-for-dollar retaliation beginning Sept. 8.

Iran’s Foreign Ministry spokesperson on Monday warned that Tehran would respond harshly to expanded U.S. sanctions, including measures against countries it sees as cooperating with Washington.

“Any escalation of this situation will undoubtedly bring about consequences,” Esmail Baghaei said. “Our hands are not tied.”

Computer programmer Fei Zhaojun's boss asked him if artificial intelligence could soon replace humans in coding jobs. Two weeks later, he was laid off from his job in Beijing, together with about 160 of his colleagues.

It's an increasingly common scenario as artificial intelligence, supported by government policies, reshapes China's massive job market. Some economists believe that might eventually undermine the overall strength of the world's second largest economy.

Iran's currency hit a record low Monday as Washington prepared to announce new sanctions it said would be an "economic D-Day" and would add further pressure on an economy already battered by previous sanctions and a U.S. naval blockade.

The rial dropped to 2.02 million to the U.S. dollar as trading opened on informal currency markets. Iran's official Central Bank rate stood at around 1.5 million rial to the dollar, but the informal rate is what most Iranians pay.

The World Bank has projected that Lebanon's economy would contract by 6.4 percent this year, as the latest Israel-Hezbollah war derailed the country's efforts at recovery.

The United States has demanded that Cuba open up to private investment, and Cuba has passed sweeping reforms to encourage just that. So Cuba's U.N. ambassador says he wants to know why Washington keeps piling on sanctions that stymie the very economic opening it has sought for decades.

Ambassador Ernesto Soberón Guzmán, in an interview this week with The Associated Press, directed his question to U.S. Secretary of State Marco Rubio, the main architect of the Trump administration's Cuba policy: