The Manufacturers Aren’t Waiting for Hormuz to Reopen

At a Beijing trade show last week, a Chinese manufacturer of pickleball paddles told CNBC he had raised U.S. prices by as much as 20 percent and was considering doubling them if the Iran war continued. His goods are made from polypropylene, a plastic derived from oil and produced heavily in the Middle East. A scarf maker at the same show, who said he sells a third of his inventory to the U.S., had already marked up his polyester products by 5 percent. A toy manufacturer was hoarding two months of PVC polymer and was unsure whether the stockpile would hold.

None of them are waiting for a diplomatic resolution.

The International Energy Agency has characterized the disruption caused by the closure of the Strait of Hormuz as the largest supply disruption in the history of the global oil market. Brent crude surpassed $100 per barrel on March 8 and climbed to $126 at its peak, up from roughly $70 before the war began in late February. Vessel tracking shows limited traffic still moving through the strait, primarily Iranian and Chinese-flagged ships, but commercial operators, major oil companies, and insurers have effectively withdrawn from the corridor. For a Chinese factory priced on spot feedstock costs, the distinction between “de facto closed” and “closed” changes nothing about this week’s price sheet.

Polypropylene and PVC Move Faster Than Most Categories

The oil price shock does not reach all product categories at the same speed or depth. Polypropylene and PVC are at the front of the line because both are petrochemical derivatives whose primary feedstocks move directly with crude prices, and because Middle Eastern producers have historically dominated feedstock supply to Chinese manufacturers.

A full closure of the Strait of Hormuz would halt LNG exports from Qatar, which supply energy for chemical and plastics production across Asia and Europe, and could drive PVC prices 20 to 40 percent higher within 60 days, depending on the duration of the closure and the availability of alternative supply routes, according to an analysis of Gulf conflict scenarios published by Oxifix, a polymer supply chain consultancy. Wang Mingming, general manager of toy manufacturer Jinming Gifts, told CNBC he was not confident his stockpile would hold. “In our industry,” Wang said, “these materials are almost irreplaceable.”

Cameron Johnson, a senior partner at Shanghai-based supply chain consultancy Tidalwave Solutions, put a deadline on it: if the Strait situation is not resolved before May, he said, there will be competition for oil-related products across entire industrial sectors, with autos and medical likely receiving allocation priority. “There is no visibility when new supply will come,” Johnson said.

For Walmart suppliers, category exposure is not uniform. Toys, sporting goods, storage, housewares, and apparel with synthetic materials are directly exposed. Categories built primarily on paper, metal, or non-petrochemical packaging have more insulation, though elevated fuel costs raise freight for everyone.

The Same Variable Suppressing Margins Is Also Suppressing Demand

The harder problem for suppliers is not simply that input costs are rising. It is that the mechanism driving up manufacturing costs is simultaneously compressing the discretionary budget of the shopper at the other end of the supply chain.

Brent crude was approximately $70 per barrel before the war began in late February and had climbed to roughly $108 by March 26, according to Iran News Wire. Deutsche Bank research, as reported by Yahoo Finance, finds that oil sustained at $100 per barrel or above over a quarter enters what the bank calls a “danger zone” for consumer spending growth. The pickleball manufacturer in Beijing named the mechanism without economic vocabulary: more spent on gas means less available for his products. “Ordinary people are getting squeezed the most from the high oil price,” he said. “Their spending power just isn’t what it used to be.”

That squeeze was already visible before the war. In Walmart’s Q4 FY26 earnings call, CFO John David Rainey cited a consumer shift away from higher-margin discretionary goods toward grocery and household essentials as a primary driver of the company’s conservative FY27 guidance. CEO John Furner described the company’s posture as “measured,” pointing to subdued consumer sentiment and student loan delinquencies as indicators warranting caution. The oil shock arrived on top of that softness, not instead of it.

The trade-down effect, where consumers move toward Walmart from higher-priced retailers, benefits total traffic but does not rescue individual categories. A supplier of seasonal outdoor recreational products or a toy brand entering a line review this spring is not helped by Walmart gaining grocery share. Those categories are precisely where the pullback is concentrated.

Suppliers Entering Q2 Are Already Operating on the Wrong Assumptions

The Beijing trade show report was published March 30, inside Q2 planning windows. Suppliers conducting cost negotiations, promotional planning, or JBP reviews right now are doing so while their Chinese manufacturing partners are mid-price-hike and before any clarity has emerged on when Hormuz might reopen.

Oil executives and analysts have said the Strait needs to reopen by mid-April or supply disruptions will worsen significantly, with economic fallout potentially escalating sharply if relief does not arrive within the next one to three weeks, according to CNBC reporting from March 28. The Dallas Federal Reserve’s model projects that the closure removes close to 20 percent of global oil supplies from the market in Q2, raising the average WTI price to $98 per barrel and lowering global real GDP growth by an annualized 2.9 percentage points during the quarter.

For 1P suppliers carrying open purchase orders from Chinese manufacturers, this is a renegotiation moment: either the factory absorbs the cost increase, which the Beijing manufacturers made clear they will not, or the cost travels up the chain. For 3P Marketplace sellers sourcing finished goods from China, the same dynamic plays out faster and with a different risk profile. A seller who reprices aggressively to protect margin risks losing the Buy Box to competitors who have not yet adjusted or who are willing to hold prices temporarily to protect rank. A seller who holds prices absorbs the margin compression directly. When multiple sellers in a category are all receiving new price sheets from the same manufacturing region simultaneously, the pressure is not idiosyncratic. It is category-wide, and there is no clean move.

Because many businesses are already absorbing most of the cost of tariffs enacted over the past year, they have limited remaining capacity to assume additional transportation and input cost increases, according to Brian Bethune, an economics professor at Boston College, who told CNN that sustained higher oil prices will produce “a persistent cost shock.” For Walmart suppliers, the tariff buffer priced into 2026 planning is being consumed by a supply event that arrived without a phase-in period, without a carve-out, and without a clear end date.

Fed Chair Jerome Powell said last week that the central bank’s response will depend on how long the current situation lasts and how consumers react, adding that the economic effects “could be bigger” or “much smaller or much bigger” depending on developments. “We just don’t know,” Powell said. That is the environment in which Q2 supplier negotiations are happening right now.

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