Wall Street’s AI Sell-Off Exposes a Weak Spot in the Bank of Mom and Dad

As more adult children count on the Bank of Mom and Dad to help them buy homes, Mom and Dad, in turn, may be counting on Wall Street.

That arrangement looked a little less secure on Friday, when fears about the cost of the artificial intelligence boom sent stocks tumbling.

The Nasdaq lost 2.9% on Oct. 30, its worst day since June, as investors grew worried about the billions of dollars companies are spending on AI. Intel shares plunged 28.6%, while chipmakers AMD and Nvidia fell 10.9% and 4.2%, respectively, according to Reuters.

The consequences could reach well beyond Wall Street and Silicon Valley. Baby boomers held approximately $35.2 trillion in stocks and mutual funds as of the second quarter of 2026, or roughly 55% of the household total, according to Federal Reserve data analyzed by Yardeni Research.

And some of that money is already making its way into their children's down payments. Half of parents who had helped or planned to help their children purchase a home reported drawing on investment accounts, according to an April survey by Veterans United Home Loans.

Of course, one bad day won't drain the Bank of Mom and Dad. But if the losses keep piling up, the damage could spill out of parents' portfolios. Research shows that after substantial financial setbacks, parents tend to scale back the money they give their adult children—or stop giving it altogether.

How Wall Street's gains became family wealth

The AI boom has played an enormous role in the stock market's recent run. Since ChatGPT's launch in November 2022, AI-related stocks accounted for roughly 75% of S&P 500 returns, according to a JPMorgan analysis.

And that rally has helped swell the fortunes of a generation already poised to pass down an extraordinary amount of wealth.

Approximately $105 trillion will pass to heirs through 2048, according to estimates from the weath management firm Cerulli Associates—with baby boomers and older generations accounting for the vast majority of the projected transfer.

But some of that money is changing hands much sooner, as parents and grandparents help adult children overcome the financial barriers to homeownership.

Nearly one-quarter of parents surveyed by Veterans United expected to contribute between $50,000 and $99,999 toward their children's home purchases, while 12% anticipated providing between $100,000 and $199,999.

They're shocking sums, and years of rising stock prices may have made those commitments easier to make.

"When their stock portfolios go up, they feel more able to help with a down payment," says Michelle Riehn, a certified financial planner and founder of Money Momma. "People feel richer."

The trouble is that those feelings—and the financial resources behind them—can change when markets fall.

In a 2025 study published in The Review of Economics and Statistics, economists Jessamyn Schaller and Chase Eck examined how financial transfers between parents and adult children changed following setbacks such as wealth losses, job exits, and health problems.

They found that parents sharply reduced financial assistance following losses of wealth and earned income, particularly in households with fewer accumulated assets.

An earlier working-paper version estimated that among lower-wealth households, a major loss of net worth reduced the likelihood of parents making a financial transfer by 6.1 percentage points, or 18.7% relative to the group's baseline rate.

The research examined financial assistance broadly, not just down payments, and didn't isolate stock market losses. Still, the findings have important implications for housing, where financial help from parents can make the difference between buying a home and remaining a renter.

Already, parental transfers account for 13 percentage points, or 27%, of young households' homeownership, according to a 2025 Federal Reserve working paper.

What happens if the AI boom falters?

Naturally, the next question for a generation waiting on those transfers is what happens if AI stocks continue to fall.

Friday's slide was far from the end of the AI boom. Despite losing more than $1 trillion in market value that day, technology stocks were still worth trillions, with Nvidia alone valued at roughly $4.9 trillion.

But researchers have examined what a much larger reversal could mean for U.S. households.

In September, Allianz Research modeled the consequences of disappointing AI investments triggering a broader market downturn.

Under its more severe scenario, a 25% decline in the S&P 500 would erase approximately $27 trillion in U.S. household wealth—nearly 14% of total household net worth—and help push the economy into recession.

That's a hypothetical scenario, not a forecast. And even losses of that magnitude wouldn't affect every family's ability to help their children equally.

Financial advisers say much depends on whether parents have already set aside the money they intend to give—or are counting on their investments to cover the gift when the time comes.

"There's a difference between help that was planned and requests that come unplanned," Riehn says.

Parents who have committed to helping their children buy homes often move that money into conservative investments well before the purchase, she explains. Doing so can shield a planned gift from a sudden drop in stock prices.

But when parents haven't prepared, a downturn can force tougher decisions.

"A lot of times they're selling stock to do it, and that's where it gets tricky in a downturn," says Greg Black, a certified financial planner and president of Tencap Wealth Coaching in Utah.

A parent who expected to sell appreciated investments to cover a $100,000 down payment might have to liquidate more shares after a substantial market decline. Rather than lock in those losses, the parent could decide to reduce the gift or postpone it.

"So if the down payment money is sitting in AI stocks and they drop, that gift might have to wait," Black says.

Even parents who could still afford to help may think twice. Riehn says watching a portfolio lose value can make affluent households more reluctant to part with money, particularly when their children make unexpected requests.

David Talley, a certified financial planner with Talley Wealth in Johnson City, TN, offers a counterpoint: Families with sufficient cash reserves and diversified investments should generally be able to maintain gifts that fit within their long-term financial plans.

"With the cash layer in place, the gift doesn't have to wait for a recovery," he says.

But younger homebuyers might not have that flexibility.

Allianz estimated that a 15% market correction could take six to nine months to reverse under one scenario. In its more severe scenario, recovering from a 25% decline could take as long as two years.

What about the wealth still waiting to be passed down?

That extended timeline points to another potential consequence of an AI bust: Any prolonged downturn could also change what parents expect to leave their children.

In an earlier working-paper version of their research, Schaller and Eck found that a major household wealth loss was associated with roughly a 5-percentage-point decline in parents' reported probability of leaving an inheritance worth at least $100,000.

That finding measures parents' expectations, not the inheritances their children ultimately received. And the consequences of a market correction would depend partly on how much of a family's wealth is tied to the stocks losing value.

"The real exception is a family with a concentrated position in one company whose net worth has doubled in a few years," Talley says. "That genuinely changes what they can give."

And if those gains reverse, so can the amount available to pass down.

Still, Riehn cautions that inheritances operate on a different timeline from down payment gifts. Children expecting to inherit investments decades from now may have time to ride out a market downturn. Those counting on that wealth for a home purchase in the nearer future may not.

The recent AI sell-off is far from a market crash, and there's no evidence it has already disrupted parental gifts or inheritances. Instead, it highlights an uncertainty at the heart of the Great Wealth Transfer: The fortunes younger Americans expect to receive aren't necessarily the fortunes their parents will ultimately leave behind.

And until that money changes hands, the next generation has little control over how much will be there—or when it will arrive.