Despite typically having only short-term effects on markets, the first year of Donald Trump’s second term has delivered notable gains for equities. Over the past 12 months, the benchmark S&P 500 has climbed 16.3%, outpacing its historical average annual return of around 10%. The tech-heavy Nasdaq Composite performed even better, surging 19%, fueled largely by widespread optimism around emerging technologies like generative artificial intelligence (AI).
Yet beneath this surface strength, challenges are building that may become harder to ignore in 2026 and beyond. Here are three key reasons why the market could be headed for a significant correction.
Consumer spending drives roughly 70% of U.S. GDP, making it the engine of the economy—often powered by credit. Data from the Federal Reserve Bank of Boston shows aggregate spending remained robust in 2025, but that strength was concentrated among the highest-income households. Spending by middle- and lower-income consumers has stagnated.
Moody’s reports that the top 10% of earners now account for nearly half of all U.S. consumer spending—an alarming statistic that suggests the economy is not as broadly healthy as top-line numbers imply. Meanwhile, auto repossessions and home foreclosures have begun to spike, traditionally a warning sign of recession. A downturn would hit stocks hard, particularly those tied to discretionary spending such as automotive, dining, and experiences.
The Trump administration’s sweeping tariffs—averaging about 18% on imports—have so far defied critics who predicted they would trigger runaway inflation. Some observers note that businesses appear to be absorbing much of the added costs rather than passing them to consumers. U.S. inflation eased to 2.7% in November, though some economists question the accuracy of recent data due to disruptions from a government shutdown.
Now, the focus shifts to whether the tariffs will survive. In 2026, the Supreme Court is set to rule on whether the White House had the authority to impose them. An unfavorable ruling could force the U.S. to refund hundreds of billions in collected duties, prompting investors to reassess the nation’s fiscal health. Should U.S. solvency come into question, Treasury yields could rise, raising capital costs economy-wide. Higher borrowing costs would weigh heavily on growth stocks that rely on debt to fund expansion.
The third—and potentially most significant—risk for stocks in 2026 has little to do with politics and everything to do with generative AI. Harvard economist Jason Furman estimates that nearly all U.S. GDP growth in the first half of 2025 came from data center spending, as tech giants stockpiled high-end GPUs from companies like Nvidia.
The problem: massive AI investments aren’t yet translating into profits for many companies buying the hardware. OpenAI, creator of ChatGPT, is projected to burn through roughly $17 billion in cash during 2026 and continues to depend on external funding, which may include an IPO this year. Should OpenAI go public, investors would get a clear look at the shaky economics underlying the generative AI boom—potentially popping what some call a trillion-dollar bubble. With so many tech companies tied to AI, a shift in sentiment could trigger a broad market correction.
While supportive policies and tech enthusiasm have driven markets higher, beneath the rally lie three growing vulnerabilities: a divided consumer, policy uncertainty, and an AI investment bubble. Together, they cast a lengthening shadow over the market outlook for 2026.
