Bank of America warns oil volatility could force central banks to abandon 'look-through' policy

This July warning represented an evolution from BofA's earlier, more nuanced stance. In a March 10, 2026 Bloomberg interview, BofA economist Aditya Bhave cautioned that markets were misreading the Fed's likely response — warning that supply shocks can sometimes lead to stable rates or even cuts, not automatic hikes . By April 1, BofA had already revised its outlook to a 'mild stagflation' scenario: slower growth, higher inflation, and oil at roughly $100 per barrel for the rest of 2026 due to the Iran conflict disrupting the Strait of Hormuz .

The bank now forecasts a supply deficit of 4 million barrels per day (bpd) in Q2 2026, with an average shortfall of 2.5 million bpd in the second half of the year, even under its base case assumption that the war ends before the end of April . In that scenario, BofA expects Brent to average $92.50/bbl in 2026, with oil prices around $100/bbl through year-end .

The 'look-through' doctrine under strain

BofA's warning directly challenges guidance from the Bank for International Settlements (BIS), the umbrella body for global central banks. On March 16, 2026, the BIS explicitly urged central banks not to overreact to the energy price spike, labeling it a 'classic instance' of when it is appropriate to look through a shock, particularly if it turns out to be short-lived .

By July, BofA was effectively arguing that the shock had persisted too long for that approach to remain valid. During the March 2026 'G4 central bank week,' rate futures markets priced in a hawkish shift, though none of the major central banks (Fed, ECB, BOJ) actually raised rates . DBS analysis noted the oil shock 'complicates the Fed's inflation battle' — the Fed revised its 2026 and 2027 core PCE inflation projections upward by 0.2 and 0.1 percentage points respectively .

ECB President Christine Lagarde, in an April 2026 speech, acknowledged the tension: 'Monetary policy cannot bring down energy prices. But we must identify when higher energy costs risk spilling over into broad-based inflation — be it through indirect effects or through second-round effects via wages and inflation expectations' .

Thailand: A net importer caught in the crossfire

Thailand, as a major net oil importer, is particularly exposed. The country's Fiscal Policy Office (FPO) on July 25, 2026 lowered its 2026 Dubai crude forecast to $82/barrel, down from a previous estimate of $91, citing easing supply risks likely to pull prices lower from Q4 2026 . The revised forecast placed the average price within a range of $77-$87 .

The Bank of Thailand's Monetary Policy Forum, on July 14, 2026, projected Dubai crude would peak in Q2/2026 before gradually declining, though year-end prices were expected to remain above pre-war levels . Under the bank's base case, the conflict eases by H1/2026 — but a worse case would see supply disruptions persist throughout 2026 .

The real-world impact has been severe. Thai inflation hit a 38-month high in May 2026, driven by surging energy costs and transport fares . The government's planning agency laid out two inflation scenarios: 1.5–2.5% if oil spikes and then falls, versus 2.5–3.5% under a scenario of high oil prices sustained for three months .

Thailand's finance minister, Ekniti Nitithanprapas, warned in April that energy infrastructure in the Middle East has been so severely disrupted that oil and gas supply may take one to two years to stabilise . PTT, the Thai state oil firm, said in April oil prices could gradually decline in Q3/2026 if the Middle East conflict eases, but cautioned that any fall would not be immediate due to stock in transit and difficulties in securing alternative supplies .

ADB: Growth cut twice as the energy crisis deepens

The Asian Development Bank has cut its forecasts twice this year as the crisis deepened. Its April 2026 outlook projected developing Asia-Pacific growth at 5.1% for 2026 . By July, with the conflict persisting, the ADB lowered this to 4.9% — down from 5.5% growth in 2025 .

Regional inflation in developing Asia is now forecast at 4.3% for 2026, compared to 3% in 2025 — an upward revision of 0.7 percentage points from April . The ADB explicitly cited prolonged disruption to energy and supply chains from the Middle East conflict, raising production costs and dampening economic activity .

For Thailand specifically, the outlook is grimmer. The ADB's April 2026 country report forecast GDP growth would slow further in 2026 before improving in 2027, reflecting softer global demand and rising energy prices . A social media post from the ADB on July 12, 2026 put Thailand's 2026 growth at just 1.8%, cited as an unofficial source . Earlier ADB forecasts from September 2025 had already slashed Thailand's growth projection to 1.6% for 2026 , while the Bank of Thailand's Monetary Policy Report Q4/2025 projected the Thai economy would moderate to 1.5% growth in 2026 .

Kasikorn Research Center estimated in March 2026 that the oil shock could shave 0.2–0.7 percentage points off Thailand's 2026 GDP growth .

The stagflation risk and the central bank trade-off

Multiple forecasts now point to the classic stagflationary pattern: slower growth combined with higher inflation — the most difficult environment for monetary policy, as raising rates to curb inflation further depresses growth. BofA's 'mild stagflation' characterization is part of a broader consensus that this is the prevailing risk across Asia and globally.

If oil remains elevated into late 2026, central banks in energy-importing economies (especially in emerging Asia, including Thailand) face the hardest trade-off: tighten policy into slowing growth, or accept above-target inflation.

Diverging oil price views reflect extreme uncertainty

Perhaps the clearest signal of uncertainty is the wide spread in oil price forecasts:

• Bank of America sees sustained $100/bbl through 2026
• J.P. Morgan expects Brent averaging only about $60/bbl in 2026 based on soft supply-demand fundamentals
• The U.S. Energy Information Administration (EIA) assumes the Strait of Hormuz remains mostly closed in its Short-Term Energy Outlook, projecting Brent at $105/bbl in June and July before declining as flows incrementally resume

The EIA noted that Brent actually fell in May 2026 on demand weakness and reports of a possible U.S.-Iran agreement — even as production outages and lower inventories kept prices elevated . A pre-conflict projection from Thailand's Oil Fund Office had assumed crude at $60-70/bbl through 2026 based on slow economic recovery and oversupply — a forecast that now appears detached from reality.

Key risk: The hardest trade-off

If the Iran conflict and supply disruptions keep oil elevated through the end of 2026, central banks in energy-importing economies will face an unenviable choice. The BofA warning that the 'look-through' approach may no longer be viable crystallizes the dilemma: either tolerate higher inflation, or tighten monetary policy into what is already projected to be slower growth.

For Thailand, where inflation has already hit a 38-month high and growth is forecast at 1.5–1.8% , the margin for error is razor-thin. The Bank of Thailand's own projections assume the conflict eases by H1/2026 — an assumption that, as of late July, has not materialised.