Stock Market Rally Fuels Economic Growth and Inequality
Market gains drive spending but widen wealth gap, deepening economic divides
Recent stock market rallies have played a central role in supporting economic activity in the United States, while simultaneously amplifying economic inequality. The S&P 500 has provided investors with a total return of 22% over the past year, 76% since 2023, and 327% over the past decade. These substantial gains have influenced patterns of consumer spending and wealth distribution across different income groups.
According to Bank of America Institute’s monthly report on depositor data, Americans across all income levels are spending at a faster rate in 2026 than in 2025, despite near-record-low consumer sentiment. However, the majority of this spending is concentrated among the wealthiest Americans. The top 20% of earners are responsible for 57% of US consumer spending, as reported by the Dallas Federal Reserve.
The composition of wealth among affluent households contributes to this trend. Wealthier Americans are more likely to own homes, which have appreciated significantly in value over recent years. Those who purchased or refinanced homes at sub-3% interest rates during the pandemic have seen especially large gains. According to the New York Federal Reserve, the top 20% of earners own more than half of the nation’s overall home value, while the bottom 20% hold just 3%.
Equity ownership represents an even more pronounced disparity. The Federal Reserve’s Distributional Financial Accounts indicate that the top 20% of earners control 87% of the wealth generated by individually owned stocks. As a result, stock market gains disproportionately benefit higher-income households.
These market gains have a direct effect on spending, particularly on discretionary goods and services. Michael Pearce, chief US economist at Oxford Economics, noted last month that, “Share price gains have been an important driver of spending on discretionary goods and services from older, wealthier households, which account for more than 50% of total spending in those categories.”
The economic impact of this spending is significant. Joe Brusuelas, chief economist at RSM US, estimates that over the past year, the market rally generated $53 billion in spending. This figure represents about one-seventh of the 2.1% annualized growth rate in US gross domestic product last quarter. Brusuelas further notes that three-quarters of the spending created by the market rally flows through the top 20% of earners.
This concentration of market-driven spending has contributed to a widening wealth gap. The result is what some economists describe as a "K-shaped" economy, where the fortunes of higher- and lower-income groups diverge. Brusuelas commented, “If we are counting on the stock market to sustain the consumer economy, we are leaning on a channel that deepens the K-shape rather than offsets it.”
The dynamic creates a paradox. While the market rally sustains overall economic activity, it also drives perceptions of inequity and unfairness, particularly among middle- and low-income Americans. For millions of individuals, the American Dream appears increasingly out of reach as wealth becomes more concentrated.
The structure of the stock market itself adds another layer of risk. A third of the S&P 500’s value is accounted for by the technology sector, and nearly a fifth of the entire market’s value is generated from chip stocks alone. The current rally, powered in part by demand for artificial intelligence technologies, is not widely regarded as a speculative bubble akin to the dot-com era. However, analysts caution that the market’s influence on consumption means a downturn could have outsized effects.
Heather Long, chief economist at Navy Federal Credit Union, stated, “It’s a K-shaped market, and it’s a K-shaped economy. The greatest risk to the economy is a downturn — and that risk is heightened when you have both of those Ks in play.”
If the rally were to end abruptly, the resulting decline in equity values could reduce incentives for wealthier households to spend, potentially triggering a sharp contraction or even a recession. Brusuelas warned, “If we should have an event that causes a significant decline in equities, it creates conditions for a sharp retraction or a recession.”
While the stock market is not synonymous with the broader economy, its current rally has become an unusually significant driver of economic conditions due to the concentration of wealth. The market’s gains both underpin consumer activity and intensify longstanding disparities, creating a complex scenario for policymakers and households alike.
In summary, the ongoing stock market rally has provided a foundation for economic growth by encouraging spending among affluent households, yet it has also deepened the divide between high- and low-income groups. The continued reliance on equity-driven wealth to sustain consumer demand underscores both the resilience and fragility of the present economic environment.