The War That Split Vietnam’s Own Energy Strategy in Two Iran’s disruption of Gulf energy flows in March delivered Southeast Asia’s largest energy shock in a decade. By late April, the region’s import bill had risen by an estimated USD 3.36 billion a month. AMRO held its 2026 ASEAN+3 growth forecast at 4.0% in June but raised its inflation call to 1.8% from 1.4%, because the war ran longer than expected and energy, commodity and logistics costs stayed high.

Headline growth no longer measures resilience. The real question is whether businesses still treat this as a passing oil shock rather than a permanent shift in the operating environment.

Inflation, subsidies, energy security and industrial competitiveness now move together. The war is not hitting Southeast Asia evenly. It is separating markets with real buffers from markets whose resilience runs out the moment the shock outlasts their patience.

The Region Looks Resilient. The Buffers Are Uneven

Southeast Asia entered 2026 from genuine strength. AMRO argues the region sits better than in past crises: inflation started low, energy efficiency improved, most governments kept policy room to manoeuvre. True in aggregate. False market by market.

The region still runs on imported hydrocarbons. The Middle East supplies roughly 55% of Southeast Asia’s crude oil imports. Oil and gas cover close to 90% of transport energy and 31% of electricity generation.

When Gulf shipments stopped moving, oil prices rose first. What mattered more: businesses had to rewrite assumptions about inflation, power costs, logistics, fiscal support and industrial competitiveness all at once.

This is not an energy shock. It is a repricing of how investors judge resilience across Southeast Asia.

The Assumptions That No Longer Hold

For years, Southeast Asia investment cases rested on four assumptions: cheap energy, cost-optimised supply chains, temporary geopolitical shocks, growth that outruns disruption. The war broke all four. Energy security is becoming a competitive advantage. Supply chains are being built for resilience, not cost. Disruption is becoming routine, not exceptional. Growth still matters, but capital is increasingly following staying power instead.

The Philippines Is the Clearest Stress Case

If one market shows the war’s direct transmission into economic risk, it is the Philippines. Manila declared a state of national energy emergency, expanded coal generation and pushed for regional energy cooperation. Transport subsidies and tax relief cushioned the initial blow but didn’t touch the underlying exposure.

The real risk isn’t the fuel price. It’s the speed: transport, food distribution and household spending all reprice fast once energy inflation accelerates, and a weakening consumer can turn a commodity shock into a demand shock.

For boards, the Philippine question isn’t headline GDP. It’s how fast inflation, subsidy strain and softer household demand start feeding each other.

Boardroom Implication: Stress-test Philippine demand forecasts against prolonged energy inflation. Don’t assume fuel costs snap back.

Indonesia Can Buffer the Shock, But the Fiscal Bill Matters

Indonesia looks more resilient, but the resilience is rented. Pertamina’s price controls have capped the pass-through of higher fuel costs, holding down headline inflation. The price is a growing subsidy bill: the longer the war runs, the more the government pays to keep pump prices still.

For investors, the risk isn’t an energy shortage. It’s a slow transfer of market risk onto the state’s balance sheet. Expand the subsidy and fiscal room narrows. Cut it and inflation jumps.

Indonesia’s lesson for boards: government intervention delays repricing. It doesn’t cancel it.

Boardroom Implication: Weigh Indonesia’s fiscal resilience against its resource strength. Subsidies move risk from consumers to the government’s balance sheet. They don’t remove it.

Thailand and Malaysia Have Better Shock Absorbers Than Their Neighbours

Thailand and Malaysia sit in a steadier middle, for different reasons. Thailand leans on its Oil Fuel Fund and refinery capacity to smooth prices at the pump. Malaysia has held its RON95 price at MYR 1.99 a litre throughout, a subsidy Prime Minister Anwar Ibrahim has said could reach MYR 24 billion this year if the war drags on.

Neither is insulated. Both face higher energy costs, softer demand and pressure on energy-intensive industry. What separates them is that both still have policy levers left to pull.

The sharper question isn’t whether they can absorb today’s prices. It’s whether prolonged disruption changes the competitiveness of the industries they’re courting.

Thailand is building itself into a regional hub for EVs, advanced manufacturing and logistics. Malaysia is fighting for semiconductor production, AI infrastructure and hyperscale data centres – sectors that need reliable power and predictable costs far more than they need a tax holiday.

If energy costs stay structurally higher, the next competitive edge goes to governments that can guarantee power and fiscal room, not the ones offering the biggest incentive package.

The war hasn’t broken either country’s investment case. It has raised the price of executing it.

Boardroom Implication: Weigh long-term energy availability alongside labour costs and incentives. The next competitive edge may come from resilience, not price.

Vietnam Shows How Quickly Transition Narratives Can Reverse

Vietnam shows how fast a transition story can reverse. Its manufacturing success now depends on energy resilience as much as labour costs and supply-chain diversification. During the crisis, Hanoi loosened fuel pricing, cut fuel taxes and restricted exports.

More telling: coal-fired generation jumped 44% month on month in March. That single number says more about the region’s energy vulnerability than any policy speech.

Vietnam is still Southeast Asia’s strongest long-term manufacturing story. But the war proved how fast an ambitious transition plan yields to immediate energy security, and that matters to boards, lenders and long-term investors well beyond environmental policy.

It touches electricity reliability, financing assumptions, operating costs, and the economics of export manufacturing assets priced under a different energy scenario.

The difference now: investors should price a higher premium for energy resilience than most valuation models assumed six months ago.

Boardroom Implication: Stress-test manufacturing investments against scenarios where energy security beats decarbonisation, temporarily or not.

The Second Shock Is Strategic

AMRO’s June update confirms the damage has spread past fuel markets. Energy, commodity and logistics costs have surged; petroleum supplies have tightened; disruption has reached industrial inputs including helium, sulfur and fertiliser.

This is where geopolitics becomes a boardroom risk: logistics costs, insurance premiums, commodity prices and financing conditions keep moving long after the military headlines fade.

It’s also where Southeast Asia’s markets start to separate. Smoothing pump prices for a month is easy. Absorbing logistics costs, protecting fiscal space, holding industrial competitiveness and keeping an energy transition on track – all at once, for a year – is not. That gap is the real divide opening across the region.

The Iran War Is Repricing Resilience

The war’s first phase was an energy shock. Its second phase is a strategy shock. Markets that once looked equally attractive are diverging by their ability to absorb repeated disruption.

Energy security, fiscal flexibility, industrial competitiveness and policy credibility are converging into a single investment consideration, not four separate ones. That’s why this conflict matters past the Middle East: it is quietly rewriting how capital gets allocated across Southeast Asia.

Companies still evaluating the region on labour costs, consumer growth and incentives alone are missing the forces now deciding who wins. The region remains one of the world’s most attractive destinations for capital. Resilience, though, is no longer evenly distributed and preparing for the next shock matters less than accepting that disruption is now part of the operating environment.

Photo Credit Tom Fisk

In April 2026, the Federation of Thai Industries reported that Thailand produced 369,751 vehicles in Q1 2026, up 5.3% year-on-year and the first quarterly increase in six quarters. The BOI has also confirmed 137.7 billion baht in committed EV supply-chain investment through June 2025. Both figures are real. Neither tells the story that fund managers and private equity principals with Thai automotive exposure actually need.

The Q1 recovery was partly driven by compensatory production requirements under Thailand’s EV incentive framework, not by a clean return to organic demand. The investment pipeline is building a supply chain with different ownership, different technology content and different value capture from the one it is replacing. That is the variable that does not appear in the headline numbers.

The Production Numbers Are Real. The Recovery Story Is Not

Thailand produced 1.47 million vehicles in 2024, down 26.5% from 2019. Domestic sales also fell sharply in 2024, marking one of the weakest periods for the sector in years. Honda has already closed its Ayutthaya vehicle assembly line, while Nissan, Suzuki and Subaru have consolidated or exited Thai production altogether.

That does not mean the sector is stabilised. BEV output in 2024 remained a small share of total production, and the spike in EV assembly late in 2025 reflected production-offset obligations rather than a clean demand-led rebound. Surapong Paisitpatanapong of the Federation of Thai Industries said the domestic production spike was tied to companies fulfilling those compensation requirements.

For investors reading the production figures, the context matters. A factory meeting a regulatory deadline is not the same as a factory running because end-demand has returned.

The EV Investment Is Replacing One Supply Chain with Another

The 137.7 billion baht in committed EV supply-chain investment is real capital, but the more important question is what it is building and who captures the value. Japan’s OEM ecosystem spent decades building a dense Thai supplier base across steel, plastics, tyres, logistics and tier-two and tier-three manufacturing.

The emerging EV ecosystem is different. Chinese brands now dominate Thailand’s EV market and the supply chain is more dependent on imported battery cells and core technology, with Thai participation still concentrated in assembly and lower-value components.

That matters because the capital headline tells you investment is arriving. It does not tell you how much of that capital stays in Thailand.

The EV3.5 framework also raises the domestic production ratio to 2:1 in 2026 and 3:1 in 2027 for imported EVs under the scheme, while the government continues to support a broader electrification transition.

That creates a more structured path for production commitments, but it also accelerates the pressure on older ICE supplier networks. Thailand’s automotive institute has warned that a large number of workers remain exposed to displacement as the sector reconfigures.

For private equity principals holding Thai industrial assets, that creates two forms of risk at once: earnings pressure from a restructuring sector and balance-sheet risk from assets whose future cash flows may have been modelled against the wrong transition speed.

The Japanese Signal the Market Has Not Priced

Masato Otaka, Japan’s ambassador to Thailand, said at The Standard Economic Forum on 29 June 2026 that “EV is not a singular answer.” That line matters because it reflects a broader multi-pathway argument – EVs, hybrids and biofuels in parallel – that aligns with the commercial interests of Japanese OEMs still tied to existing Thai production.

Thailand’s 30@30 target remains a policy ambition rather than a fully binding industrial endpoint. If the government continues to lean toward a multi-pathway approach, the transition will stay slower and more uneven than a pure-EV narrative suggests.

That extends the window for Japanese OEM production. It also extends the uncertainty for suppliers caught between two industrial architectures with different technology paths and different capital needs.

The market is not yet pricing that tension cleanly.

The Portfolio Question the Headline Numbers Do Not Answer

At current valuations, the Asia-Pacific private equity market does not reward earnings uncertainty. The Thai automotive sector carries structural uncertainty on two axes: the speed of Chinese EV capital displacing Japanese supplier networks, and the extent to which Thailand’s policy path stays on a multi-track rather than a pure-EV trajectory.

The sector is not at a crossroads. It has already taken one turn. Production has fallen, Japanese capital has consolidated and Chinese EV capital has entered. The question for investors is whether the assets they hold were valued for the road already taken or the one they were told was coming.

Ten million Filipinos work abroad. Their transfers home – USD 37.2 billion in 2025 – funded Philippine household consumption for three decades, smoothed every current account deficit and allowed Manila to run a growth model it never had to replace.

That model is now under pressure from three directions simultaneously. The World Bank has put a number on what that means: 3.7% GDP growth in 2026, down from 5.3% projected in January, 1.3 percentage points below the government’s own floor target.

The gap is not a rounding error. It is the distance between an economy growing at its structural potential and one whose only reliable engine is misfiring for the first time in a generation.

Three Pressures on One Engine

The first is geographically direct. The Middle East hosts 2.5 million Filipino workers whose transfers account for 18% of total OFW remittances – 1.5% of GDP, per MUFG Bank research published 9 March 2026. BSP Governor Eli Remolona acknowledged the exposure on CNBC, noting downside risk to Gulf labour demand. “We’re a top exporter of labor services,” he said.

Shilan Shan, deputy chief emerging markets economist at Capital Economics, was sharper: a Gulf remittance drop would widen external deficits “at a time when high energy prices will already be pushing deficits deeper.”

The second pressure is the peso. It closed at PHP 59.735 on 14 March 2026, a record low. Depreciation inflates the peso value of each dollar remitted – which is why March data showed nominal growth while household purchasing power fell.

Peso depreciation inflates the dollar value of each transfer on paper. But with Philippine CPI at 3.4% in March 2026 and remittance growth at 2.3%, the purchasing power those transfers deliver has shrunk. Recipient households are receiving more pesos that buy less.

The third is oil. Over 36% of the Philippine CPI basket is directly or indirectly exposed to energy prices, per National Statistician Claire Dennis Mapa. MUFG estimates every USD 10 per barrel increase cuts GDP growth by 0.2 percentage points and lifts inflation by 0.6 percentage points.

With Brent above USD 100 through mid-March and the World Bank’s full-year baseline at USD 94, the arithmetic hits the household on both fronts: remittances arrive worth less in real terms, and the cost of everything they buy is rising.

The BSP Is Caught Between Two Fires

The BSP entered 2026 in easing mode. MUFG’s base case as of 9 March projected two further rate cuts to 3.75% by October – contingent on oil falling toward USD 70 by Q2 2026. Oil is at USD 94 on the World Bank’s full-year baseline. It was above USD 100 through mid-March. The cycle the BSP planned is not the one it can deliver.

Remolona stated publicly that USD 100 oil (already exceeded) could force the BSP to end easing. MUFG models show sustained oil above USD 100 pushes Philippine inflation above the 4% upper target in 2026 and into 2027. A central bank hiking into 3.7% growth is not managing an oil shock. It is managing a stagflationary trap.

The external position tightens the corner further. MUFG estimates USD 100 oil widens the current account deficit to approximately 3% of GDP. A deficit at 3% of GDP pressures the peso directly. A weaker peso raises the PHP cost of oil imports. The loop runs without a new external trigger.

What the 2028 Number Actually Signals

The World Bank projects recovery to 5.6% in 2027 and 2028 – within the government’s target band. Two conditions underpin it: geopolitical uncertainty dissipating and energy prices stabilising. Both are assumptions, not forecasts.

The World Bank’s own downside scenario puts global output at 1.3% in 2026 under sustained energy disruption and financial market stress. The Philippines – ranked among ASEAN’s most oil-exposed economies by MUFG, with over 36% of its CPI basket tied to energy prices – sits in the upper range of that exposure.

Ser Percival Pena-Reyes, Senior Research Fellow at the Ateneo Center for Economic Research and Development, named the structural question the 3.7% figure raises. “The key question is whether the Philippines can lift its potential growth rate rather than simply recover cyclically,” he said.

Marco Agonia, economist at the University of Asia and the Pacific, identified the signal beneath the projection. “The traditional driver of the Filipino growth engine, remittance-led consumption, is petering out,” he said. A cyclical rebound in 2027 – driven by base effects and infrastructure spending – does not answer what permanently replaces it.

For fund managers with Philippine equity exposure, peso depreciation and BSP rate reversal risk are already in 2026 models. The question not yet priced is structural: if Gulf labour flows slow permanently, the 2027 recovery is not a return to form. It is a one-time reprieve before a reckoning the Philippines has not yet prepared for.

Indonesia’s credit default swaps are pricing a loss of investment-grade status. The rupiah is at IDR 18,190 – a record low. The Jakarta Composite is the world’s worst-performing major equity index in 2026, down 42%. The Hormuz closure contributed to all three. It caused none of them.

Three policy decisions, each taken before the first US-Israeli missile struck Iran on 28 February, dismantled the mechanisms that would have absorbed the shock. What followed was not bad luck meeting a fragile economy. It was a predetermined arithmetic arriving on schedule.

On 12 June, 1,500 students marched on Jakarta’s Hotel Indonesia roundabout under a banner reading “Heading to Bankrupt Indonesia.” Two days earlier, Pertamina had raised Pertamax fuel prices 32%. The students were late to a conclusion the bond market had already reached.

Three Decisions Removed the Buffers Before the Storm Hit

Indonesia’s oil exposure is direct and quantifiable. The country sources approximately 19% of its crude imports through the Strait of Hormuz. Every USD 1 above the 2026 budget assumption of USD 70 per barrel adds IDR 10.3 trillion in subsidy costs. It returns only IDR 3.6 trillion in revenue. At sustained USD 100 oil, the annual shortfall exceeds IDR 300 trillion.

A solvent government with functioning FX mechanisms absorbs that. Indonesia no longer had either.

The first decision was Danantara. Earlier in 2026, President Prabowo Subianto directed commodity exports – Indonesia’s primary automatic foreign exchange stabiliser – into a sovereign wealth fund reporting directly to the presidency. The structure bypassed Bank Indonesia and market-rate pricing.

Kieran Curtis, Head of Emerging Markets Local Debt at Aberdeen in London, said the restructured arrangement was simply “not as efficient as exports finding their own market.” When the rupiah needed dollar inflows, the channel that had historically delivered them was no longer open.

The second was Bank Indonesia’s independence. Parliament passed legislation adding employment and growth objectives to the central bank’s mandate and extending parliamentary powers over monetary policy. Prabowo had also nominated his nephew as deputy governor. Foreign investors had priced BI’s autonomy as the structural anchor for Indonesian fixed income. That anchor was loosening before oil moved.

The third was fiscal headroom. The free meals programme – IDR 268 trillion (USD 15 billion) per year, 14% of the entire 2024 budget – was funded not by new revenues but by cuts to infrastructure and development spending. The absorptive capacity a shock required was gone before the shock arrived.

When Hormuz closed, all three failures activated at once. A falling rupiah raises the IDR cost of dollar-denominated obligations, which widens the fiscal deficit, which drives CDS spreads higher, which triggers capital outflows, which weakens the currency further. The oil price was the trigger. The policy sequencing was the cause.

The Currency Is Not Falling. It Is Feeding on Itself.

The rupiah is down 8% year-to-date and 7% from when the Iran conflict began, with the steepest three-week decline since 2020. Foreign holdings of Indonesian government bonds have collapsed from near 40% before the pandemic to 12.6% – a near 20-year low. Net foreign equity outflows reached USD 3.2 billion through end-May, the heaviest since 2009. Bank Indonesia delivered a 50-basis-point emergency rate hike in May and deployed USD 12 billion in reserves. Neither arrested the slide.

John Woods, Asia Chief Investment Officer at Lombard Odier, was unambiguous: “It is true, there is a doom-loop forming.” Persistent outflows at multi-year lows in bond and equity holdings, he noted, would continue to pressure the rupiah, liquidity and asset prices.

Tan Altundag, Investment Manager for Emerging Equities at Pictet Asset Management – which has reduced its Indonesian equity holdings – was equally direct: “Indonesia is suffering from a genuine confidence crisis.” The currency’s trajectory, he added, risks pushing up inflation, tightening financial conditions and compressing growth in sequence.

A currency under this momentum does not stabilise through central bank signalling. It stabilises when the policies that destroyed confidence are reversed. That has not happened.

A Downgrade Is Not the Same Event for Every Investor

Moody’s and Fitch have cut their Indonesian debt outlooks to negative, citing deteriorating policymaking credibility. S&P has conditioned its rating on fiscal consolidation – a condition the free meals programme and subsidy overhang make structurally difficult to meet. MSCI is reviewing Indonesian equity market standards; a demotion to frontier status remains a tail risk.

The transmission differs by position type.

Government bond holders face the most immediate trigger. A formal downgrade below investment grade activates mandatory liquidation from IG-mandate funds. Foreign ownership stands at 12.6% – a near 20-year low – leaving thin technical support for prices. Forced sellers in a thin market push yields higher, raise borrowing costs and add fiscal pressure at the moment the deficit is already under strain.

The IDX, down 42%, faces a second wave if a credit event triggers EM-mandate exclusions on top of the confidence-driven selling already in progress. The existing decline prices some of that risk. Not all of it.

Private credit and PE positions face a structurally separate problem. Covenant packages written in 2023 and 2024 – when IDR 16,000 was a conservative stress – now operate with the rupiah past IDR 18,000 and no reversal catalyst in view. IDR/USD mismatches that appeared manageable at underwriting are live breaches today. Exit proceeds in USD compress at every point above IDR 16,000, independently of operating performance.

Hemant Mishr, Chief Investment Officer at S CUBE Capital, named the repricing directly: Indonesia is no longer priced as a reliably orthodox emerging market, but as one carrying rising policy risk. The downgrade triggers by position type are mapped in the companion piece: What an Indonesian Downgrade Actually Does to Your Portfolio.

The Exit Requires Undoing What Was Done

The rupiah can stabilise. Indonesia’s resource endowment is intact. A credible reversal on Danantara’s structure, Bank Indonesia’s mandate and the fiscal trajectory would shift the confidence calculus. The conditions are not complex. They are three decisions Prabowo would have to publicly unmake – each central to his mandate, each publicly defended.

Mark Ledger-Evans, Asia-focused Emerging Markets Fixed Income Portfolio Manager at Ninety One, framed it without softening: “It is possible for countries to pull themselves out of a negative spiral where they have put themselves in that position to begin with.”

Possible. Not automatic. The managers pricing stabilisation as remote are not pessimists. They are reading the same political constraints the CDS market priced months ago.