A sharp correction in global equity markets combined with a pullback in artificial intelligence investment could push the US economy into recession in 2027, according to a downside scenario modeled by Fitch Ratings.
The credit rating agency said the shock could have consequences far beyond Wall Street. Under the scenario, global economic growth could fall below 1% in 2027, bringing the world economy close to stagnation on a per-capita basis.
The warning comes as the AI investment boom has become an increasingly important source of US economic growth. Rapid increases in technology capital spending have boosted business investment, while gains in AI-related stocks have also supported household wealth and consumer spending.
Fitch emphasized, however, that the recession scenario is a “what-if” analysis rather than its baseline economic forecast. Its central outlook remains considerably stronger.
Fitch’s downside scenario assumes a major stock-market correction
In its September 2026 Global Economic Outlook, Fitch modeled the potential consequences of an abrupt reversal in financial-market optimism surrounding AI.
The scenario assumes US equity prices fall by 35%, while equities outside the US decline by 15%. Fitch also incorporated an additional confidence-driven shock to US private investment.
Under those conditions, US GDP would contract by 0.6% in 2027, according to the agency’s model.
That would represent a significant departure from Fitch’s baseline outlook, which currently calls for US economic growth of 2.1% in both 2026 and 2027.
The scenario illustrates how closely parts of the US economy have become linked to the AI investment cycle.
“AI boom” is not simply referring to money flowing into AI startups. The broader investment surge includes spending on data centers, computing equipment, semiconductors and other technology infrastructure required to develop and deploy AI systems.
Fitch said this investment has been providing substantial support to US economic activity.
Why an AI slowdown could affect the broader economy
The AI boom is influencing the economy through several channels.
The most direct is capital expenditure. Technology companies and other businesses have been investing heavily in computing infrastructure and related equipment.
A second channel is the stock market. Strong performance from companies viewed as beneficiaries of AI has increased household wealth, which can support consumer spending.
That creates a potential feedback loop.
If investors begin questioning the future profitability of AI investments, technology stocks could decline. Companies could then respond by reducing or delaying capital expenditure, while weaker household wealth could weigh on consumption.
Fitch’s scenario attempts to capture those combined effects.
The agency noted that equity valuations appear elevated by some measures and that the future returns from massive AI investments remain uncertain. A correction in equity prices accompanied by a retrenchment in IT capital spending could therefore become a broader macroeconomic shock.
Global growth could fall below 1%
The potential impact would not be confined to the United States.
Fitch’s model indicates that global growth could fall below 1% in 2027 under the downside scenario.
The eurozone and China would each see growth around 0.8 percentage points below their respective baseline forecasts in 2027.
The transmission channels would include weaker US demand, falling financial-market wealth, reduced technology investment and weaker international trade.
Economies that are heavily integrated into global technology supply chains could also feel the effects.
South Korea, for example, has benefited from the surge in global IT spending, while Mexico and other trading partners have also benefited from stronger US-linked activity. A reversal in technology investment could therefore have implications across manufacturing and semiconductor supply chains.
Canada and Mexico could face significant trade effects
Canada and Mexico could be particularly exposed because of their close economic relationships with the United States.
A US recession would likely weaken demand for imported goods and services, putting pressure on economies that depend heavily on US trade.
Technology-heavy economies could face an additional channel of weakness if companies worldwide cut semiconductor, computing and data-center investment.
The potential shock would therefore extend beyond financial markets, affecting corporate investment, trade and industrial production.
A sharp disinflationary shock could lead to aggressive rate cuts
A major economic slowdown would also change the outlook for inflation and monetary policy.
Fitch’s downside scenario points to strong disinflationary pressure as weaker demand and reduced investment weigh on economic activity.
Under the modeled scenario, the Federal Reserve could respond with aggressive interest-rate cuts, with Fitch estimating a cumulative reduction of around 325 basis points.
That response would be aimed at supporting demand and limiting the depth of the downturn.
However, the effectiveness of monetary easing would depend on the nature of the shock. If falling asset prices and weaker corporate investment were accompanied by broader financial stress, lower interest rates alone might not immediately restore business confidence.
Fitch’s baseline outlook remains resilient
Despite highlighting the potential risks surrounding the AI investment boom, Fitch is not forecasting a US recession in its central scenario.
Instead, the agency raised its global growth forecast for 2026 to 2.6%, up from its previous 2.4% projection.
It expects global GDP growth of 2.5% in 2027 and 2.6% in 2028.
Fitch also raised its US growth forecasts for 2026 and 2027 to 2.1%. Its current baseline forecast puts US growth at 2.3% in 2028.
The contrast between the two scenarios is important.
Fitch’s baseline assumes the AI investment boom continues to support economic activity. Its downside scenario asks what could happen if financial-market valuations and technology spending reverse sharply at the same time.
The agency’s latest outlook describes the AI investment boom as a significant source of support for the US economy while also identifying a potential AI-related market correction as a key risk to the global outlook.
The bigger question: Can AI investment keep delivering?
The underlying issue is not whether AI is transforming the technology industry. It is whether the enormous investment required to build the AI ecosystem will eventually generate enough economic returns to justify current spending.
Companies are committing billions of dollars to data centers, chips, networking equipment and computing capacity. For now, that spending is itself contributing to economic growth.
But if expectations for future AI revenue fall sharply, businesses could reassess their investment plans.
That is the risk Fitch’s scenario is designed to illustrate.
For investors and policymakers, the distinction between an AI-driven investment boom and an AI-driven economic bubble is therefore becoming increasingly important. Strong investment can boost productivity and growth when it produces sustainable returns. But if investment becomes dependent on continually rising asset prices and expectations, a sudden reversal can transmit financial-market weakness into the real economy.
Fitch’s analysis does not predict that such a reversal will occur. Instead, it quantifies how severe the consequences could be if a major equity correction and AI investment pullback happened simultaneously.
For now, the agency’s baseline remains one of continued global expansion. But the growing economic importance of AI means that any major change in investor confidence or corporate technology spending could have consequences well beyond the technology sector.