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On May 9, 2026, Cox Automotive’s latest weekly market assessment adds a new layer to the U.S. auto industry’s resilience story: Americans’ financial assets are growing far faster than income, and that expanding wealth is helping to keep vehicle demand alive even as affordability strains mount. With the personal savings rate near a historic low, the report suggests that traditional gauges like paychecks alone are no longer enough to explain why people are still buying cars.
Cox Automotive Chief Economist Jeremy Robb examined Federal Reserve Distributional Financial Accounts data in the firm’s new Auto Market Weekly Summary. He focused specifically on assets that households can tap relatively quickly outside of retirement accounts: deposits, money market funds, debt securities, corporate equities, and mutual fund shares. Those categories, taken together, have grown at a compound annual rate of 11.3% over the past seven years.
That number stands out when set against the broader economy. Over the same period, the Consumer Price Index compounded at just 3.9%, personal income grew at an annual rate of 5.7%, and personal expenses grew at 6.3%. In other words, household spending has been outpacing after-tax income for years, while the value of investable assets has surged. That divergence is central to Cox’s argument: a large part of recent consumer spending is being underwritten by asset growth rather than by wage growth alone.
This helps explain a confusing detail in the official data. The U.S. personal savings rate has dropped from 6.8% to roughly 3% since 2019. A naïve reading of that trend would suggest consumers have little financial cushion left. But Cox’s analysis points in the opposite direction. If household financial assets are compounding at double-digit rates, the apparent collapse in the savings rate may be less alarming than it looks. People can spend above their paychecks because their balance sheets are improving, even when the monthly savings line is thin.
The new data also clarifies who is benefiting from this support. Wealth gains are not spread evenly across the population. Cox said the top 10% of U.S. households now hold 82% of the financial assets measured in the report, up from roughly 75% before the pandemic. That concentration carries a clear implication: if financial wealth is increasingly propping up auto demand, then the most affluent buyers are likely providing a disproportionate share of that support.
Still, the report finds that some improvement has reached lower wealth groups. Money market fund holdings across all households have risen 197% since the pandemic. More surprisingly, holdings among the bottom half of households have compounded at 24.9%. That suggests that even some lower- and middle-income consumers have accumulated larger cash buffers in recent years, which may help explain why mass-market vehicle demand has not fallen more sharply despite high interest rates and still-elevated transaction prices.
The composition of the assets Cox analyzed brings an important risk into focus. Corporate equities and mutual fund shares account for 72% of the total portfolio he tracks. That means the so-called “wealth effect” supporting auto sales is heavily dependent on the stock market. A sustained correction in equities could erode the financial buffer more quickly than a rise in unemployment or a downturn in wage growth. For the auto industry, this creates an unusual new vulnerability: consumer sentiment and showroom traffic may now swing with the S&P 500 as much as with interest rates.
Why does this matter for vehicle demand? The auto market has spent the past few years in an unusual spot. New-vehicle prices, while moderating, remain far above pre-pandemic levels. Monthly payments are still historically high because of elevated financing costs. Cox’s own affordability index has shown near-record pressure on household budgets. Yet national sales volume has remained steady, and fleet and retail demand have repeatedly defied forecasts of a sharp slowdown. The economist believes the widening asset base is one reason consumers have been willing or able to absorb higher transportation costs.
In practical terms, some car buyers are likely using investment accounts, matured CDs, or money market balances as a source of down-payment cash. Others may be choosing to pay cash or use shorter loan terms. This “financial buffer” does not show up in traditional income data, but it helps explain why dealer showrooms continue to produce sales. The report implicitly cautions against reading the low personal savings rate as a sign that consumer spending is about to break.
There is also a deeper strategic takeaway for retailers. If household wealth is becoming a key driver of auto demand, the market may be increasingly two-speed. Affluent buyers with sizeable financial portfolios will be less sensitive to rate hikes and price increases. Shoppers in lower wealth tiers will remain far more dependent on credit availability, discounts, and subvented financing. Dealers may need to segment their marketing more carefully, tailoring outreach to asset-rich consumers who can act regardless of monthly payment levels while still offering value-driven options to credit-sensitive buyers.
A stock market shock is therefore the biggest indirect risk to auto sales. Because equities and mutual funds make up most of the assets Cox examined, a drop in market valuations would compress household financial wealth and could quickly translate into weaker discretionary spending on big-ticket items. The exact trigger point is unclear, but the report implies that the same financial tailwind that has been helping the auto industry could reverse sharply if investor sentiment sours.
One more nuance in the data is worth emphasizing. Cox’s analysis deliberately excludes retirement accounts. That choice understates the total wealth picture for many households, especially those with large 401(k) or IRA balances. But it also captures the assets that are most accessible for spending in the near term. For automakers and dealers, that distinction matters: the money held outside retirement accounts is closer to the cash that actually buys vehicles. The fact that those assets have compounded at 11.3% annually makes them a meaningful and measured source of purchasing power.
The report also adds context to the debate about consumer health. For months, economists have pointed to falling savings and rising credit card balances as red flags. Yet those data points may be giving an incomplete signal. When asset growth is expanding at double-digit rates, a lower flow of monthly savings can coexist with a stronger household balance sheet. Cox’s analysis does not dismiss the dangers of high debt or affordability pressure, but it does show that the consumer’s financial foundation is more complicated than the savings rate alone suggests.
For automotive retailers, the key message is not simply that wealthy customers are buying cars. It is that financial markets have become a de facto demand factor in the industry. Keeping close watch on Wall Street valuations, money market flows, and Fed policy may now be as important as tracking dealer inventory or incentive spending. Cox’s report suggests that the car market’s resilience cannot be properly understood without looking at the full balance sheet of the American consumer.
The analysis comes as the auto industry works through a more normalized inventory environment and stronger competitive pressure on pricing. If asset growth remains strong, the industry may keep holding up better than expected through the middle of 2026. But if markets wobble, the very same wealth effect that has supported demand could become the most visible weak point in the U.S. consumer story. For now, Cox’s data makes one point clear: income tells only part of the story, and wealth is increasingly steering the wheels of the American auto market.
