Oil shock Southeast Asia | Strait of Hormuz disruption | Stagflation risk Philippines Thailand | Fuel subsidy bills Asia 2026

Picture a Monday morning in Bangkok’s Chatuchak district. Nattapong, a 34-year-old motorcycle-taxi driver who normally hauls commuters through gridlocked sois for roughly 400 baht a day, is staring at a petrol pump display that has climbed the equivalent of 18% in eight days. He hasn’t raised his fares yet — the app won’t let him — but his margins have almost evaporated. “Before, I could fill up and still send money home,” he says quietly. “Now I’m not sure.”

Multiply Nattapong’s dilemma across 700 million people, eleven countries, and a dozen interconnected supply chains, and you begin to understand what the Strait of Hormuz crisis of March 2026 is doing to South-east Asia. On the morning of Monday, March 9, 2026, Brent crude futures spiked as high as $119.50 a barrel — a session high that will be branded into the memory of every finance minister from Manila to Jakarta — before settling around $110.56, still up nearly 40% in a single month. WTI posted its largest weekly gain in the entire history of the futures contract, a staggering 35.6%, a record stretching back to 1983.

The trigger: joint US-Israeli strikes on Iran beginning February 28, which escalated into a full war and brought Strait of Hormuz shipping to a near-total halt. The choke point — that narrow 33-kilometre-wide passage between Oman and Iran — carries roughly 20 million barrels of oil per day, about one-fifth of global supply. When Iran’s Revolutionary Guard declared the waterway effectively closed and warned vessels they would be targeted, the arithmetic was brutal and immediate. Iraq and Kuwait began cutting output after running out of storage. Qatar’s energy minister told the Financial Times that crude could reach $150 per barrel if tankers remain unable to transit the strait in coming weeks. At Kpler, lead crude analyst Homayoun Falakshahi was blunter: “If between now and end of March you don’t have an amelioration of traffic around the strait, we could go to $150 a barrel,” he told CNN.

For South-east Asia — a region that imports the overwhelming majority of its oil and whose economies run on cheap fuel the way a clock runs on a mainspring — this is not merely a commodity story. It is a cost-of-living crisis, a monetary policy dilemma, and a fiscal time bomb, all detonating simultaneously.

Oil Shock Southeast Asia: Why the Region Is Uniquely Exposed

The geography alone is damning. Japan and the Philippines source roughly 90% of their crude from the Persian Gulf; China and India import 38% and 46% of their oil from the region, respectively. South-east Asia as a whole, with the sole exception of Malaysia, runs a persistent deficit in oil and gas trade. When the Strait of Hormuz tightens, the region doesn’t just pay more — it scrambles for supply.

MUFG Research calculates that every US$10 per barrel increase in oil prices worsens the current account position of Asian economies by 0.2–0.9% of GDP, with Thailand, Singapore, Taiwan, India, and the Philippines taking the largest hits. From a starting price of roughly $60 per barrel in January 2026 to a current print north of $110, that’s a $50-per-barrel shock — implying current account deterioration of potentially 1–4.5% of GDP for the region’s most vulnerable economies. Run that number through to your household electricity bill, your bag of jasmine rice, your morning commute, and the pain becomes visceral.

Nomura’s research team, in a note that has become one of the most-cited documents in Asian trading rooms this week, identified Thailand, India, South Korea, and the Philippines as the most vulnerable economies in Asia. The bank’s reasoning is unforgiving: Thailand carries the largest net oil import bill in Asia at 4.7% of GDP, meaning every 10% oil price change worsens its current account by 0.5 percentage points. The Philippines runs a current account deficit that, at oil above $90 per barrel on a sustained basis, is likely to breach 4.5% of GDP. “In Asia, Thailand, India, Korea, and the Philippines are the most vulnerable to higher oil prices, due to their high import dependence,” Nomura wrote, “while Malaysia would be a relative beneficiary as an energy exporter.”

Country by Country: Winners, Losers, and the Ones Caught in the Middle

The Philippines: Worst in Class, No Cushion

If there is one country in the region for which this crisis reads like a worst-case scenario, it is the Philippines. Manila has nearly 90% of its oil imports sourced from the Middle East and, crucially, operates a largely market-driven fuel pricing mechanism with minimal subsidies. There is no state buffer absorbing the shock before it hits the pump. Retailers in Manila imposed over ₱1-per-liter increases for the tenth consecutive week as of early March, covering diesel, kerosene, and gasoline. The Philippine peso slid back through the ₱58-per-dollar mark on March 9, adding a currency depreciation multiplier to an already brutal import bill.

ING Group estimates the Philippines could see inflation rise by up to 0.4 percentage points for every 10% increase in oil prices. At Nomura, the estimate is 0.5pp per 10% rise — the highest pass-through in the region. Oil at $110 represents roughly an 80% increase over January’s $60 baseline, an inflationary impulse that Capital Economics pegs could push headline CPI well above the Bangko Sentral ng Pilipinas’s 2–4% target. Manila has already announced plans to build a diesel stockpile as an emergency buffer — an admission that supply anxiety, not just price, has entered the conversation.

Thailand: The Biggest Structural Loser

Thailand’s problem isn’t just the size of its oil import bill — it’s the timing. The country is already wrestling with below-potential growth, persistent deflationary pressures in some sectors, and a tourism sector still finding its post-COVID footing. MUFG Research flags Thailand as one of the economies most sensitive to oil price increases from an inflation perspective, with CPI rising up to 0.8 percentage points per US$10/bbl increase — the highest reading in their Asian sensitivity matrix.

The government responded swiftly, announcing a suspension of petroleum exports to protect domestic stocks, an extraordinary measure that signals just how seriously Bangkok is treating supply security. The Thai baht, already vulnerable, has come under selling pressure alongside the Philippine peso, Korean won, and Indian rupee. For Thai factory workers supplying export goods to Western markets, higher transport and energy costs arrive precisely when global demand is wobbling under the weight of US tariffs. It is, as the textbook definition goes, a stagflationary shock — cost pressures rising while growth falters.

Indonesia: The Fiscal Tightrope

Indonesia occupies a peculiar position. It is technically a net importer of petroleum products — paradoxical for a country that was once an OPEC member — but it deploys a system of fuel subsidies (via state-owned Pertamina) that partially shields consumers from global price moves. The catch, of course, is that the shield is funded by the national treasury.

Indonesia’s government budget was built around an Indonesian Crude Price (ICP) assumption of $70 per barrel for 2026. With Brent at $110, that assumption looks almost quaint. Government simulations, according to Indonesia’s fiscal authority, show the state budget deficit could widen to 3.6% of GDP if crude averages $92 per barrel over the year — already above the 3% legal ceiling. At $110 sustained, the numbers are worse. Officials have acknowledged that raising domestic fuel prices — essentially passing the shock to consumers — could become a last resort. Nomura estimates a 10% oil price rise could worsen Indonesia’s fiscal balance by 0.2 percentage points via higher subsidy spending, breaching the 3% deficit ceiling at sufficiently elevated prices. President Prabowo Subianto, who swept to power partly on a cost-of-living platform, faces a politically combustible choice between fiscal discipline and popular anger at the pump.

Malaysia: The Region’s Unlikely Winner

Not everyone in South-east Asia is suffering equally. Malaysia, a net oil and gas exporter and home to Petronas — one of Asia’s most profitable energy companies — finds itself on the rare right side of an oil shock. MUFG Research identifies Malaysia as the only net oil and gas exporter in the region, likely to see a small benefit to its trade balance from higher prices. The ringgit, which has been strengthening as a commodity-linked currency, provides a further buffer.

The complexity lies in Malaysia’s domestic subsidy architecture. Kuala Lumpur has been in the process of a painstaking, politically fraught RON95 fuel subsidy reform — targeting the top income tiers first — which was already reshaping the fiscal landscape before the current crisis. Higher global prices actually make the reform argument easier: the subsidy bill would explode if oil stays elevated, giving Prime Minister Anwar Ibrahim political cover to accelerate rationalization. For Malaysia’s treasury, $110 oil is a revenue windfall and a subsidy headache simultaneously.

Singapore: The Price-Setter That Cannot Escape

Singapore imports everything, including every drop of fuel, but its role as a regional refining and trading hub makes it a price-setter rather than merely a price-taker. The city-state’s commuters are already feeling it: transport costs have risen sharply, and the government’s careful cost-of-living management is under renewed pressure. MUFG’s analysis ranks Singapore among the economies with the highest current account sensitivity to oil price increases, even though its GDP per capita provides a far larger fiscal cushion than its regional neighbours.

Stagflation Risk: The Word Nobody Wanted to Hear

The word “stagflation” is being whispered — and in some trading rooms, shouted — across Asia this week. Nomura’s note explicitly warns of a “stagflationary shock”: the simultaneous combination of rising inflation (from fuel and food cost pass-through) and slowing growth (from weakening consumer purchasing power and export competitiveness). It is the worst of both monetary worlds, leaving central banks without a clean tool. Cut rates to support growth, and you risk stoking inflation. Hold rates to fight inflation, and you choke a slowing economy.

ING Group notes the impact is far from uniform, with several economies partially shielded by subsidies or regulated pricing — but for the Philippines, the stronger inflation hit from market-driven fuel prices creates direct pressure on the BSP to hold rates. Capital Economics, while not abandoning its rate-cut forecasts for the Philippines and Thailand, has flagged that central banks may pause if oil hits and holds above $100 — as it already has. The ripple effects move quickly: higher fuel costs push up food prices (fertilisers, transport, cold chains), which push up core inflation, which pushes up wage demands, which erode manufacturer competitiveness. The chain is well-known. The speed this time is not.

Travel and Tourism: The Invisible Casualty

The oil shock has an airborne dimension that tends to get buried beneath the more immediate news of pump prices and fiscal deficits. Jet fuel — which tracks closely with crude — has surged in lockstep with Brent. Airlines operating regional routes out of Singapore’s Changi, Bangkok’s Suvarnabhumi, and Manila’s NAIA are facing fuel costs that represent 25–35% of operating expenses at normal prices. At current Brent levels, that share rises materially. The consequences are already filtering through: several Gulf carriers have partially resumed flights from Dubai International Airport after earlier disruptions, but route uncertainty and insurance premiums for Gulf overflight remain elevated.

For South-east Asia’s tourism recovery — Bali, Chiang Mai, Phuket, and Palawan were all expecting strong 2026 visitor numbers after several lean post-pandemic years — the arithmetic is uncomfortable. Higher jet fuel costs translate, with a lag of weeks rather than months, into higher airfares. Budget carriers such as AirAsia and Cebu Pacific, which built their business models around cheap fuel enabling cheap tickets, have the least pricing power and the thinnest margins. The traveller contemplating a Bangkok city break or a Bali retreat in Q2 2026 may find the price tag has quietly risen 10–20% since they first searched. That is not a crisis. But it is a headwind — and a reminder that in a globalised economy, no leisure industry is fully insulated from a Persian Gulf conflict.

Could Oil Really Hit $150? The Scenarios

The $150 question is no longer a fringe analyst talking point. Qatar’s energy minister said it publicly. Kpler’s lead crude analyst said it on record. Goldman Sachs wrote to clients that prices are likely to exceed $100 next week if no resolution emerges — a forecast already overtaken by events.

Three scenarios shape the trajectory:

Scenario 1 — Rapid de-escalation (30 days). The US brokers a ceasefire, Hormuz reopens to traffic with naval escorts, and oil retraces toward $80–85. This is the “fast war, fast recovery” template. The damage to South-east Asia is real but contained — a quarter or two of elevated inflation, some current account deterioration, minor growth drag.

Scenario 2 — Prolonged blockade (60–90 days). Tanker insurance remains unavailable or prohibitively expensive, shipping companies stay out, and the physical supply disruption persists. JPMorgan’s Natasha Kaneva has modelled production cuts approaching 6 million barrels per day under this scenario. Brent in the $120–130 range becomes the base case. For South-east Asia, this means inflation breaching targets in the Philippines and Thailand, subsidy bills in Indonesia threatening fiscal rules, and a genuine monetary policy bind across the region.

Scenario 3 — Escalation with infrastructure damage. Further strikes on Gulf energy facilities — as already seen against Iranian oil infrastructure and Qatari and Saudi installations — reduce physical capacity for months, not weeks. $150 becomes plausible. The 1970s-style shock, feared but never fully materialised in the 2022 Ukraine episode, arrives in earnest. South-east Asian growth forecasts get ripped up. The IMF’s 2026 regional outlook, cautiously optimistic as recently as January, would require emergency revision.

The G7 finance ministers were meeting Monday to discuss coordinated strategic reserve releases; the Trump administration announced a $20 billion tanker insurance programme, though shipping companies remain hesitant to transit the region. These measures can dampen prices at the margin. They cannot substitute for an open strait.

Policy Responses and the Green Energy Accelerant

Governments across the region are not waiting passively. Thailand’s petroleum export suspension, Manila’s emergency diesel stockpiling, Indonesia’s scenario planning for domestic fuel price adjustments — these are the short-term reflexes of policymakers who have been through oil shocks before and know that the first 72 hours matter.

The more interesting question is whether this crisis, like previous energy shocks, accelerates structural energy transition. Malaysia’s Petronas has been expanding LNG capacity and renewable partnerships. Indonesia’s vast geothermal resources — the world’s second-largest — have long been under-utilised relative to their potential. The Philippines, which currently imports nearly all its energy, has been pushing solar and wind development under the Clean Energy Act framework. The calculus that kept governments cautious about rapid transition — cheap imported fossil fuels were easy and politically manageable — has just shifted violently.

As ING’s analysis notes, energy makes up a large share of consumer inflation baskets across emerging Asia, meaning the political pain of oil shocks is both immediate and democratically legible. Leaders who endure it once tend to invest in insulation against the next one. The 1973 oil shock gave Japan its world-class energy efficiency. The 2022 Ukraine crisis gave Europe its renewable acceleration. Whether 2026’s Hormuz crisis becomes South-east Asia’s inflection point toward genuine energy security remains the region’s most consequential open question.

The Bottom Line

Brent at $110 and rising is not a number — it is a sentence, handed down to 700 million people who had little say in the conflict that produced it. For the Philippines, it means inflation at the upper edge of tolerance and monetary policy frozen in place when the economy needs easing. For Thailand, it is a stagflationary pressure on a growth story that was already fragile. For Indonesia, it is a fiscal arithmetic problem that risks breaching the legal deficit ceiling. For Malaysia, it is a windfall tempered by subsidy obligations and political exposure. For Singapore, it is a cost-management challenge that tests the city-state’s well-earned reputation for economic resilience.

The $150 scenario is not inevitable. But it is no longer implausible. And in a region that runs on imported energy, the difference between $110 and $150 is not merely financial. It is the cost of a week’s groceries for a Manila family. It is whether a Thai factory orders its next shift. It is whether Nattapong, Bangkok’s motorcycle-taxi driver, can still afford to fill his tank and send money home.

That is the oil shock South-east Asia is living through, right now, in real time.