Global economic outlook: Energy disruption raises inflation and tightening risks, while AI investment remains a powerful but uneven growth pillar

Overview

This global macro outlook examines how Middle East-related energy disruption, renewed monetary tightening, fading fiscal support and the AI investment boom are shaping growth, inflation and financial risks through 2028. HSBC sees resilient near-term activity but a more difficult growth-inflation trade-off ahead.

Core views

The report argues that the escalation of Middle East conflict has intensified a global energy shock. Brent crude was around USD100 per barrel as the report was published, roughly USD30 per barrel above three months earlier, while European wholesale gas prices were about 150% above pre-war February levels. Disruption to the Strait of Hormuz, pressure on refined-product supply and higher freight costs are feeding rapidly into household fuel bills and business input costs. Although oil futures still implied a USD30 per-barrel decline within a year, HSBC sees short-term oil-price risks tilted upward because inventories have already cushioned prior supply disruptions and may be approaching a practical floor. Global growth was more resilient than expected in Q2, including in Europe and energy-importing Asian economies. Temporary lower oil prices after the June US-Iran memorandum, fiscal support and the AI capex boom supported confidence, investment and trade. This stronger first half drives HSBC's upgrade to 2.7% global growth in 2026 from 2.5%; the 2027 forecast remains 2.7%. The institution stresses that this is not an improvement in the forward outlook: higher inflation and rates should slow consumer spending later in 2026, while fiscal impulse is expected to turn negative in the US, Europe and many other economies in 2027. Korea and Taiwan are exceptions where tech-sector revenues and more active fiscal policy may support domestic demand. Inflation remains predominantly an energy story, rather than a broad wage-price spiral in advanced economies. HSBC raises its 2027 global inflation forecast to 3.3% from 3.1%. Food-price pressure has not yet broadened materially, but higher fertiliser and diesel costs, reduced yields and possible El Niño effects could lift food inflation in 2027. In the US, services inflation and rental inflation have softened, and core CPI excluding shelter ran at a 1.9% annualised pace over the five months since February. Wage growth slowed to 3.1% year-on-year in September, while first-half unit labour-cost growth was 1.3%. These factors underpin HSBC's expectation that non-energy inflation will not accelerate meaningfully, although prolonged high energy, shipping and hardware costs could eventually squeeze margins and broaden pass-through. Central banks are nevertheless responding to the threat that supply shocks unanchor inflation expectations. HSBC expects modest further tightening: one additional 25bp increase from the Fed and Bank of Japan, two from the ECB and RBA, and Bank of England hikes of 25bp in November and February that would take Bank Rate to 4.25%, followed by reversals from August 2027. The report has added rate rises for 17 of the 28 central banks it covers, including seven where it previously expected policy to remain unchanged. HSBC characterises this as a credibility response: policy cannot directly remove an external supply shock, but can seek to prevent second-round effects without unnecessarily damaging growth. If a durable ceasefire restored Strait of Hormuz flows to 70-80% of pre-war levels, HSBC's oil analysts expect a meaningful market surplus and current tightening could be reversed. Fiscal policy supported 2026 activity through subsidies, tax rebates, defence and infrastructure spending, but the report sees a worsening medium-term debt challenge. Many advanced economies have high debt stocks, rising borrowing costs and large spending commitments, while governments have not yet adopted durable consolidation plans. The US fiscal impulse is expected to turn negative in 2027 after 2026 tax rebates. The report also flags the USD41.1 trillion US debt limit as likely requiring action earlier in 2027. Japan is a separate market-risk focus: faster Bank of Japan tightening, yen intervention or a shift by the Government Pension Investment Fund toward domestic assets could encourage repatriation of Japanese savings, affecting the yen, JGBs, US Treasuries and carry trades. AI is the second dominant crosscurrent. HSBC remains optimistic on the AI capex buildout through 2027-28 because spending commitments are multi-year and supply is constrained by bottlenecks in advanced semiconductors, high-bandwidth memory and electricity grids. AI is supporting US investment, Asian exports and commodity demand, while the US currently hosts about three quarters of global AI computing capacity. Taiwan illustrates the scale of the boom: consensus 2026 GDP growth moved from 5% at the start of the year to above 11%, supported by AI-related exports. The benefits remain uneven: AI-related activity can lift headline GDP, equity values and export income without immediately improving broad consumer confidence or domestic demand, notably in mainland China. The report separates the AI outlook into buildout, eventual productivity and labour effects, and financial-market consequences. Adoption is still uneven across firms and sectors, and reported use does not necessarily mean AI is embedded in workflows. HSBC considers a result between a modest and substantial adoption scenario more likely than an extreme outcome. Business-survey evidence cited in the report suggests a potential productivity improvement of about 1.4% per year, but the labour-market effect remains uncertain. There is little conclusive evidence of broad AI-related job losses in current US data, though lower graduate hiring, weaker labour-market confidence and greater reporting of AI-related layoffs warrant monitoring. Cybersecurity spending and risks could offset some productivity gains. AI also creates a financial-risk channel. HSBC notes that a reassessment of expected returns on AI investment, especially if higher rates persist, could trigger an equity correction. A 40-50% equity-market correction would be needed to erase the past four years' financial-wealth gains for the wealthiest US households, whose spending matters disproportionately for aggregate demand. A sharp AI-related correction would weaken US consumption and investment, reduce exports from Taiwan, Korea and mainland China, depress AI-linked commodity prices such as copper, and transmit globally through pension and mutual-fund holdings. HSBC estimates that the mechanical loss of the AI investment boost could lower US growth by roughly 0.5-0.6 percentage points. For 2028, HSBC's baseline remains trend-like: global growth of 2.7% and global inflation of 2.6%, with growth still below pre-pandemic norms in many countries because of trade friction, slower labour-force growth and high debt. The baseline is highly conditional on energy flows. A durable ceasefire and sharply lower energy prices could improve real incomes and lower inflation; persistent conflict could disrupt supply chains, raise costs and rates, weaken interest-sensitive sectors and increase the odds of an equity correction. The report also notes that neither the ECB nor the Fed's published forecasts have inflation back at 2% by 2028.

Analysis framework

HSBC starts with the energy shock and its transmission through consumer prices, company margins, trade and confidence. It then links those conditions to global growth forecasts, inflation dynamics, central-bank responses and fiscal sustainability. The AI assessment uses three lenses: the investment buildout, uncertain productivity and labour-market effects, and possible financial-market spillovers. Country forecasts combine GDP, inflation, policy-rate, fiscal, trade and exchange-rate assumptions.

Methodology notes

• Industry AnalysisSupply-demand framework

  Energy supply disruptions, inventory drawdowns and Strait of Hormuz shipping flows

  The report assesses oil and gas prices by linking disrupted supply and shipping routes with inventories, demand adjustments and possible future market surplus.

• MacroeconomicsCredit and Debt Cycle

  Fiscal deficits, debt servicing costs, long-term yields and debt sustainability

  HSBC examines how higher interest rates and persistent deficits worsen public-debt dynamics and may constrain future fiscal support.

• Event-Driven and Behavioral FinanceEvent-driven analysis

  Scenario analysis for geopolitical escalation, ceasefire and an AI equity-bubble correction

  The report compares how different energy-flow and AI-market outcomes could alter inflation, rates, growth, investment and asset prices.

• Other

  AI adoption scenarios

  HSBC uses modest, substantial and extreme AI-adoption scenarios to frame uncertain productivity, employment and growth outcomes.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Global government bonds

  Higher inflation, policy tightening and fiscal-sustainability concerns can put upward pressure on yields.

  Strengths

  A durable energy-price decline could permit reversal of current tightening.

  Weaknesses

  High debt, large deficits and rising debt-service costs create vulnerabilities.

  Comparison

  Japanese repatriation risk could affect JGBs, US Treasuries and global carry trades.

  Risks

  Persistent energy shocks or loss of monetary credibility could push yields higher.

• Japanese yen, JGBs and yen carry trade

  Faster Bank of Japan tightening or Japanese asset repatriation could affect all three.

  Strengths

  HSBC expects JPY to remain range-bound under its central case.

  Weaknesses

  The Bank of Japan is described as behind the curve, with 10-year yields around 3%.

  Comparison

  Japan is both a major overseas investor and a funding source for global carry trades.

  Risks

  Accelerated rate hikes, intervention or GPIF allocation changes could encourage repatriation.

• AI-related equities and supply-chain assets

  AI capex supports investment, exports and commodity demand, particularly in the US and Asian technology economies.

  Strengths

  Multi-year spending commitments and supply bottlenecks support the buildout through 2027-28.

  Weaknesses

  Benefits are uneven and monetisation timing remains uncertain.

  Comparison

  The US leads data-centre capacity; Taiwan, Korea and mainland China are major export beneficiaries.

  Risks

  An AI-driven equity correction could weaken consumption, investment, exports and commodity prices.

Key data

• Global GDP growth forecast, 20262.7%Raised from 2.5%, largely because of stronger-than-expected first-half growth.
• Global GDP growth forecast, 20272.7%Unchanged despite expected moderation in late 2026 and fading fiscal support in 2027.
• Global inflation forecast, 20273.3%Raised from 3.1% as higher energy prices increase headline inflation risk.
• Brent crude oil priceAround USD100 per barrelLevel at publication; about USD30 per barrel higher than three months earlier.
• European wholesale natural-gas pricesAbout 150% above pre-war February levelsStorage was low heading into the European autumn.
• Central banks with additional hikes in HSBC forecasts17 of 28Seven were previously expected to remain on hold in H2 2026 and 2027.
• US wage growth3.1% year-on-year in SeptemberTogether with productivity above 2%, it kept first-half unit labour-cost growth at 1.3% year-on-year.
• Taiwan 2026 GDP growth forecast11.0%AI-export strength is the principal driver.

Impact & implications

HSBC sees a world in which AI investment continues to support selected economies, supply chains and trade, but does not fully offset the drag from higher energy costs, restrictive policy and fading fiscal stimulus. The key macro transmission is from energy prices to real incomes, inflation expectations, policy rates, borrowing costs and ultimately consumption and investment. The report regards the durability of Strait of Hormuz flows and the continuation of the AI cycle as central determinants of the outlook.

Risks

• A prolonged Middle East conflict could keep energy prices volatile, disrupt supply chains and depress growth.
• Energy and food-cost pressures could broaden into second-round inflation effects and trigger more restrictive policy.
• Fading fiscal stimulus alongside high rates could weaken consumer spending and investment in 2027.
• High public debt, deficits and yields could force fiscally difficult adjustments or provoke market stress.
• An AI-related equity bubble could burst, reversing wealth effects, investment, trade and commodity support.
• AI adoption may displace knowledge workers faster than new roles emerge, while cybersecurity costs and risks rise.

What to watch

• Strait of Hormuz traffic volumes and whether a durable ceasefire restores flows to 70-80% of pre-war levels.
• Oil, refined-product, gas, freight and food-price developments, including El Niño-related effects.
• Evidence of energy-cost pass-through into company margins, wages and non-energy inflation.
• Central-bank decisions, particularly expected further Fed, ECB, BoE, BoJ and RBA tightening.
• Fiscal developments, including the US debt limit, budget decisions and long-term borrowing costs.
• AI capex commitments, semiconductor and grid bottlenecks, adoption quality, labour-market effects and AI-related equity valuations.
• Signs of Japanese investor repatriation and potential effects on the yen, JGBs, US Treasuries and carry trades.