Any move against Chinese refiners or banks handling Iranian crude carries a direct oil market consequence: curbing discounted Iranian barrels would tighten supply and could push prices higher just as the market absorbs an already elevated geopolitical risk premium from the naval blockade. Traders are likely to treat this as a slow-burn story rather than an immediate catalyst, since Washington has signalled intent without confirming specifics. The China angle is the one to watch most closely, given any escalation against Chinese banks risks a tit-for-tat response from Beijing on critical minerals exports, a flashpoint that could ripple well beyond energy markets.---Earlier:Oil- weekend recap & what's ahead: Iran vows to keep Hormuz shut, Trump tells Americans to accept high gas pricesWashington has plenty of Iran pressure points left to pull, but few that squeeze Tehran without also risking a costly fight with Beijing.Summary:Treasury Secretary Scott Bessent has promised unprecedented economic pressure on Iran, expected as soon as next week, though Washington has not detailed specifics.China buys the vast majority of Iran's oil exports, much of it through independent teapot refiners with limited exposure to the US financial system.Treasury has warned two major Chinese banks over handling Iranian funds but has stopped short of formal sanctions, wary of Beijing retaliation ahead of a planned Trump-Xi meeting.Other options include tighter curbs on UAE-based exchange houses used to repatriate Iranian oil proceeds, broader secondary sanctions modelled on the North Korea approach, and confiscating rather than freezing Iranian overseas assets.A land blockade would need cooperation from neighbours including Iraq, Turkey and Pakistan, while secondary tariffs face legal hurdles after a Supreme Court ruling.Analysts describe much of the existing sanctions regime as a "whack-a-mole" exercise that has yet to shift Iran's strategic calculus.Treasury Secretary Scott Bessent says Washington is preparing to hit Iran with economic measures unlike anything seen before, with new steps expected as soon as next week. The administration has not detailed what it has in mind, though the range of remaining pressure points is narrower than it first appears, given Iran is already under a naval blockade and thousands of existing sanctions.China's central role in Iran's oil trade is the most obvious target. Beijing buys the large majority of Iran's crude, much of it processed by independent "teapot" refiners with little exposure to the US financial system, making them harder to deter than larger buyers. Treasury has already sanctioned some smaller Chinese refiners and firms, and according to Bloomberg Economics, has warned two larger Chinese banks they could face secondary sanctions if Iranian funds move through their systems, though it has stopped short of naming them, wary of provoking Beijing ahead of a planned meeting between President Trump and President Xi Jinping.Other levers under discussion include tighter action against exchange houses, mostly based in the United Arab Emirates, that help Iran convert oil proceeds, often received in yuan, into usable currency. Washington could also broaden secondary sanctions to any entity doing business with Iran, an approach modelled on the campaign against North Korea, or move from freezing to confiscating Iranian state assets already within US jurisdiction.A land blockade, requiring cooperation from neighbours including Iraq, Turkey and Pakistan, and secondary tariffs on countries trading with Iran, both face significant obstacles: the former is logistically difficult given mountainous terrain along parts of Iran's borders, while the latter lost its legal underpinning after a Supreme Court ruling.Of the options on the table, targeting Chinese teapot refiners and exchange houses looks the most readily implementable in the near term, since both build directly on measures Treasury has already taken. Broader moves against major Chinese banks, a land blockade or new tariff powers face steeper diplomatic, legal or logistical hurdles, and analysts caution that without a shift in White House priorities toward Iran over China, none of the options are likely to change Tehran's calculus. This article was written by Eamonn Sheridan at investinglive.com.