The US just threatened to financially isolate any country doing business with Tehran. China, which buys the vast majority of Iran’s oil, immediately fired back, warning it will take “all necessary measures” to protect its interests.
When the US drops a financial bomb on a rival nation, it expects the rest of the world to duck and cover. But when that rival’s biggest customer happens to be a global superpower with its own economic weapons, the explosion gets a lot more complicated.
On Monday, US Treasury Secretary Scott Bessent announced what he called “Operation Economic Outcast.” He described it as an “economic D-Day” against Iran, aiming to choke off Tehran’s revenue streams and force an end to the six-month-old war between the US and Iran.
Bessent did not mince words about who was in the crosshairs. He warned that any bank, business, or country continuing to trade with Iran would share in its isolation. When asked specifically about Chinese banks, he made it clear that “no one was above the reach of US sanctions.”
China did not blink.
Foreign ministry spokesman Lin Jian fired back on Tuesday, calling the US move “illegal unilateral sanctions.” He warned that Beijing would take “all necessary measures” to safeguard its rights.
“Cooperation between China and Iran has always been conducted within the framework of international law and should not be interfered with or disrupted,” Lin said.
The stakes are incredibly high. China buys roughly 90% of Iran’s exported oil. If Beijing decides to retaliate, it holds a massive card: the global supply of rare earth minerals, which are critical for high-tech manufacturing and military hardware. Beijing has already tightened export controls on these minerals during previous trade fights with Washington.
This financial showdown is dropping right in the middle of a messy geopolitical timeline. A 60-day ceasefire between the US and Iran just expired last week with no peace deal in sight. Iran has effectively choked off the Strait of Hormuz, sending global oil prices skyrocketing. President Donald Trump is reportedly planning to call world leaders to demand they cut ties with Tehran, and he is scheduled to meet with Chinese President Xi Jinping next month.
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Experts are skeptical that the US sanctions will actually work. David Oxley, an economist at Capital Economics, called the new package a “damp squib.” He noted that China has ignored US sanctions on Iran in the past and is unlikely to be intimidated now.
Ali Vaez from the International Crisis Group pointed out that countries simply cannot afford to comply. Neighbors like Pakistan, Turkey, and Iraq want to keep the US happy, but they rely too heavily on Iran to cut ties. And as for Tehran, Vaez noted that economic pressure rarely works because the regime is willing to “absorb any pain” and just pass the suffering down to its citizens.
Iran’s Economy Minister Ali Madanizadeh echoed that defiance, telling state TV that Tehran has a “two-year plan” to manage the fallout and its “own tools” to play the game.
The US wants to tighten the noose. Iran says it is ready for the squeeze. And China is standing right in the middle, daring Washington to make the next move.
