Benchmark crude palm oil futures have climbed 19.5% since the start of the US-Iran conflict, with Brent crude trading near US$104 a barrel and Jakarta's revived B50 biodiesel mandate set to absorb between 16.3 and 17 million tonnes of CPO annually — a squeeze that is already reshaping Indonesia's exportable surplus and the bulk-tanker lanes that move it.

The arithmetic is stark. USDA expects Indonesia to produce 47.2 million tonnes of palm oil in 2026/27, up from 46.7 million tonnes, yet exports are projected to fall to 23.5 million tonnes from 23.8 million tonnes. The entire 500,000-tonne production increase is matched by a 500,000-tonne increase in domestic consumption, which rises to 23.73 million tonnes.

For freight operators, that means fewer tonnes leaving Indonesian ports — primarily Dumai, Balikpapan and Belawan — for the headline trade lanes to India (8.7 million tonnes of palm oil imports forecast for 2026/27, up from 8.1 million) and China (flat at 3.9 million tonnes). With India diversifying into sunflower oil (+24% to 3.85 million tonnes) and China nearly doubling sunflower imports to 1.15 million tonnes, substitution pressure on palm oil freight is real even before any weather-driven shortfall.

What does the B50 rollout mean for exportable supply?

B50 reached 6,050 of Indonesia's 6,412 covered filling stations by Sept 15 — about 94% coverage — with full transition expected by Oct 1. Energy Minister Bahlil Lahadalia estimates B50 will require an extra 1.1 to 1.8 million tonnes of CPO on top of the 15.2 million tonnes already absorbed under B40.

Higher fossil-fuel prices have narrowed the biodiesel-diesel subsidy gap, making B50 fiscally easier to run. Non-subsidised diesel in Indonesia now costs more than three times as much as subsidised biodiesel. The additional mandate demand sits directly on top of B40 absorption, leaving a smaller share of incremental production available for export.

David Ng, senior proprietary trader at IcebergX, says the B50 effect may already be priced in. "We probably need to see actual signs that production is not keeping up, or that Indonesian exports and stocks are starting to fall for CPO to make another strong move higher."

Ng argues the mandate still underwrites prices. "I think B50 should continue to provide a decent floor for CPO prices. Indonesia could require somewhere around 16 million to 17 million tonnes of palm oil for the programme, so even if production improves, quite a lot of the supply will still be absorbed domestically. That should keep the overall supply situation fairly tight."

How much does El Niño actually cut output?

The World Meteorological Organization puts the probability of the current El Niño persisting through February 2027 at near 100% and expects further strengthening. Indonesia's rainy season is expected to arrive later than normal across 61% of the country, with the event described as the strongest in 11 years.

The US National Oceanic and Atmospheric Administration rates the probability of a very strong event this northern hemisphere autumn and winter at above 90%. Reuters-cited estimates point to Indonesian palm oil production declining 2% to 8% in 2027, with the Malaysian Palm Oil Council flagging a nine-to-twelve-month lag between drought conditions and yield impact.

Following the 2015 El Niño, Malaysian CPO production fell 13.2% in 2016 to 17.32 million tonnes, with fresh fruit bunch yields down 13.9% to 15.91 tonnes per hectare. Ng says the threshold that matters is severity. "If production only falls by around 1%-2%, I'm pretty sure the market can absorb most of it, especially if stocks remain comfortable. But if we start talking about something closer to a 5% decline or more, then I think it becomes much more significant."

Is there a price ceiling?

USDA expects global palm oil exports to fall 2% in 2026/27 even as sunflower and rapeseed oil exports rise. Global production slips to 81.12 million tonnes from 81.44 million tonnes, exports to 45.26 million tonnes from 46.25 million tonnes, and ending stocks to 14.47 million tonnes from 14.95 million tonnes.

The price ceiling sits in competing oils. Soybean oil is trading at roughly a US$300-per-tonne premium to palm oil — comfortably wide by historical standards. Ng pegs the buyer-switching range at a US$50-US$100 discount to soybean oil.

US biofuel policy could narrow that margin. The One Big Beautiful Bill Act extended the Section 45Z Clean Fuel Production Credit until 2029 and, from 2026, restricts qualifying fuels to feedstocks grown or produced in the US, Mexico or Canada, with an applicable credit of up to US$1 per gallon. US biofuel producers consumed a record 1.56 billion pounds of soybean oil in June, up 49% year on year, accounting for 41.2% of the US low-carbon-intensity feedstock pool.

USDA expects total US soybean oil consumption to rise another 9% to 15 million tonnes in 2026/27. Global soybean oil production is still forecast to climb to 75.1 million tonnes, ending stocks to 6.92 million tonnes — supportive but not yet a global shortage.

Who captures the earnings?

For investors weighing the freight and plantation value chain, Neoh Jia En, fund manager at KAF Investment Funds, favours upstream-heavy Malaysian planters with El Niño-resilient yields. "Upstream-heavy producers definitely have stronger earnings leverage to higher CPO prices. Within upstream producers, those that can maintain fresh fruit bunch and CPO output growth despite the impact of El Niño — and, ironically, those with higher production costs — will benefit more."

He highlights Sarawak Oil Palms, Ta Ann Holdings, Hap Seng Plantations and Sarawak Plantation on rainfall and management guidance. He also flags SD Guthrie's 1.2 billion sq ft Carey Island land bank as a rezoning catalyst potentially worth more than the company's market capitalisation — though rezoning and monetisation would take years and may not deliver on assumed prices.

For now, the export squeeze is real but bounded. Whether Indonesia's palm oil tanker lanes to Mumbai and Shanghai carry 500,000 fewer tonnes in 2027 hinges on a winter El Niño that forecasters already rate at very strong intensity.