As Baby Boomers Age, Will the Shift to Bonds Impact the Stock Market?
It’s been dubbed the “Great Boomer Selloff.”
If you have not heard this term in financial publications yet, it may just be a matter of time before you encounter it. The basic idea goes something like this: baby boomers, who collectively own trillions in financial assets, are entering retirement at a rapid pace. The implication is that in retirement, this entire generation will systematically shift their portfolios away from stocks and into income-oriented strategies, like bonds. With Gen X being a smaller generation, and Millennials and Gen Z still ramping up their savings, the fear is that selling will outpace buying, causing stock prices to suffer for years.1
Recent media coverage gives the “Great Boomer Selloff” an air of urgency. But like many forecasts connecting demographics with stock market performance, it glosses over several important realities.
The most important reality, in my view, is the surprise factor (or lack thereof). The baby boomer generation did not just start aging and retiring in large numbers last month—these shifts have been unfolding for decades. What tends to move markets are unexpected developments that add or subtract trillions from global GDP—not slow-moving, well-known changes like we’re seeing with demographics.
The other problem with the “Great Boomer Selloff” theory is that it makes incorrect assumptions about retail investor behavior, while also overstating the impact that a generation of retail investors can have on the stock market.
Let’s start with the former. The baby boomer generation spans nearly two decades, from ages 61 to 79. Will all boomers start selling stocks en masse at the same time? I highly doubt it. If there’s a net drawdown, it will likely unfold over time—not in a single, market-shaking event. Many boomers will continue to buy and hold stocks for years to come, whether it’s to generate the growth needed to span longer retirements, to continue building wealth for legacy purposes, or to generate income via dividends. In other words, it is far from assured that boomers will abandon equities as they age.
On the latter point of overstating retail investor impact, it’s important to remember that retail trading is only one part of the demand equation. Institutional investors like pension funds, endowments, sovereign wealth funds, and insurance companies are massive market participants with long investment horizons. Institutions don’t invest for 10 or even 20-year time horizons, they’re thinking much longer term. Many are also required to maintain equity exposure to meet future obligations. And this does not even factor-in the consistent demand from corporate share buybacks.
On the supply side, equity markets look different than they did when boomers were accumulating assets in the 1980s and 1990s. The number of publicly traded U.S. companies has declined significantly from more than 7,000 in the late 1990s to around 3,700 today. That’s due to several forces: fewer IPOs, a preference for staying private, a surge in mergers and acquisitions, and sustained corporate buyback programs. In short, the supply of investable equities has been shrinking. Even if demand from one generation softens slightly, there are fewer shares available to push prices lower.
Lastly, Millennials and Gen Z are increasingly participating in equity market investing. They’re investing through workplace retirement plans, brokerage platforms, and digital tools that make market access easier than ever. They may not be able to fully replace boomer demand overnight—but they don’t have to. Their growing participation is part of a longer-term transition that should help support demand over time.
Bottom Line for Investors
Demographics are important, but they’re not a massive surprise force moving the stock market. The “Great Boomer Selloff” suggests that a generation of investors is poised to shock the markets with asset allocation adjustments in their retirement years, but the theory omits the reality that markets are shaped by a wide range of forces: supply and demand, institutional behavior, investor psychology, and more.
I’ve also seen this worry play out before. The theory that shifting demographics would adversely impact the stock market has been circulating for decades, and yet the stock market trades today near all-time highs with new generations of investors participating. I don’t expect that to change as baby boomers get older.
1 Reuters. May 23, 2025. https://advisor.zacksim.com/e/376582/verwhelm-us-stocks-2025-05-23-/5t3z4m/1242320052/h/vAqtUW7H53T-HJvYhYwGMtUdOIxwhsnVolBnWOi_Qp0
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